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Vidyasagar Reddithota was received PhD in physics in 2008 by Sri Venkateswara University and Master of Science (M.Sc) in Physics in 2003 by Sri Venkateswara University. Working area(s) are related with Physical Sciences with emphasis on Condensed Matter Physics (Ferromagnetic semiconductors-spintronics, ferroelectrics, magneto-optical effects, magnetic shape memory alloys, and diluted magnetic semiconductor).
Identificação

Identificação pessoal

Nome completo
Vidyasagar Reddithota

Nomes de citação

  • Reddithota, Vidyasagar
  • R Vidyasagar

Identificadores de autor

Ciência ID
0919-DD77-0024

Domínios de atuação

  • Ciências Exatas - Física - Física da Matéria Condensada

Idiomas

Idioma Conversação Leitura Escrita Compreensão Peer-review
Telugo (Idioma materno)
Inglês Utilizador proficiente (C1) Utilizador proficiente (C1) Utilizador proficiente (C1) Utilizador proficiente (C1)
Português Utilizador elementar (A1) Utilizador elementar (A1) Utilizador elementar (A1) Utilizador elementar (A1)
Japonês Utilizador elementar (A1) Utilizador elementar (A1) Utilizador elementar (A1) Utilizador elementar (A1)
Formação
Grau Classificação
2009
Concluído
 PhD (Doktor (PhD))
Sri Venkateswara University, Índia
"Studies on Synthesis, Structural, Optical and Magnetic Properties of Mn, Co, and (Mn, Co) Substituted ZnO Nanoparticles." (TESE/DISSERTAÇÃO)
 Awarded
2003
Concluído
 Master of Science in Physics (Master)
Sri Venkateswara University, Índia
"n/a" (TESE/DISSERTAÇÃO)
 First class with distinction
Percurso profissional

Ciência

Categoria Profissional
Instituição de acolhimento 		Empregador
2019/08/01 - 2022/07/31 Pós-doutorado (Investigação) Fundação para a Ciência e a Tecnologia, Portugal
Universidade de Aveiro, Portugal
2019/02/01 - 2019/07/31 Investigador visitante (Investigação) Slovenská akademická informacná agentúra, Eslováquia
Univerzita Pavla Jozefa Šafárika v Košiciach, Eslováquia
2015/12/01 - 2018/11/30 Pós-doutorado (Investigação) Fundação para a Ciência e a Tecnologia, Portugal
Universidade de Aveiro, Portugal
2015/06/01 - 2015/11/01 Pós-doutorado (Investigação) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil
Universidade Federal de Pernambuco, Brasil
2014/10/15 - 2015/05/31 Pós-doutorado (Investigação) Suranaree University of Technology, Tailândia
Suranaree University of Technology, Tailândia
2011/05/11 - 2014/03/31 Pós-doutorado (Investigação) Kobe Daigaku, Japão
Kobe Daigaku, Japão
2010/02/10 - 2010/12/31 Pós-doutorado (Investigação) National Sun Yat-sen University, Taiwan
National Sun Yat-sen University, Taiwan
Projetos

Bolsa

Designação Financiadores
2015/12/01 - Atual Ferroelectric-graphene structures: fabrication, properties, applications
SFRH/BPD/104887/2014
Investigador Pós-doutorado
Universidade de Aveiro, Portugal
 Fundação para a Ciência e a Tecnologia
Em curso
2015/05/01 - 2015/11/30 Magneto-optical effects in YIG thin films
88881.068005/2014-01
Investigador Pós-doutorado
Universidade Federal de Pernambuco, Brasil
 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brasil
Concluído
2005/06/01 - 2006/05/01 Mechanoluminescence of ZnMnTe Crystals
DRR/PHY/UG01/2003
Bolseiro de Doutoramento
Concluído

Projeto

Designação Financiadores
2011/04/01 - 2014/03/31 Magneto-optical properties of intrinsic ferromagnetic semiconductor
CREATE-Director
Investigador Pós-doutorado
Kobe Daigaku, Japão
 Center for Collaborative Research and Technology Development (CREATE), Kobe University.
Concluído
Produções

Publicações

Artigo em conferência
  1. Vidyasagar, R.; Yoshitomi, H.; Kitayama, S.; Kita, T.; Ohta, H.; Sakurai, T.. "Evaluation of minority and majority spin band energies of ferromagnetic GdN thin film using optical absorption spectroscopy". 2012.
    10.1063/1.4848417
Artigo em revista
  1. Hennel, Miroslav; Varga, Michal; Frolova, Lucia; Nalevanko, Samuel; Ibarra-Gaytán, Pablo; Vidyasagar, Reddithota; Sarkar, Partha; et al. "Heusler-Based Cylindrical Micro- and Nanowires". physica status solidi (a) (2022): 2100657. http://dx.doi.org/10.1002/pssa.202100657.
    10.1002/pssa.202100657
  2. Galdun, L; Vidyasagar, R; Hennel, M; Varga, M; Ryba, T; Nulandaya, L; Milkovic, O; et al. "Fe–Mn–Ga shape memory glass-coated microwire with sensing possibilities". Journal of Physics D: Applied Physics 55 4 (2021): 045303. http://dx.doi.org/10.1088/1361-6463/ac2f6b.
    Publicado • 10.1088/1361-6463/ac2f6b
  3. Vidyasagar, Reddithota; Galdun, Ladislav; Ryba, Tomas; Sucik, Gabriel; Reiffers, Marian; Kovac, Jozef; Vargova, Zuzana; Varga, Rastislav. "Martensitic transformation in Fe42Mn28.3Ga29.7 Heusler alloy accompanied with a huge variation of initial permeability". Journal of Alloys and Compounds (2020): 155346. http://dx.doi.org/10.1016/j.jallcom.2020.155346.
    10.1016/j.jallcom.2020.155346
  4. Zelenovskii, P.; Romanyuk, K.; Vidyasagar, R.; Akhmatkhanov, A.; Zhao, P.; Shur, V. Ya.; Kholkin, A. L.. "Effect of ferroelectric domains on electric properties of single layer graphene". Ferroelectrics 542 1 (2019): 93-101. http://dx.doi.org/10.1080/00150193.2019.1574669.
    10.1080/00150193.2019.1574669
  5. Vidyasagar, Reddithota; Kita, Takashi; Sakurai, Takahiro; Shimokawa, Tokuro; Ohta, Hitoshi. "Ferromagnetic resonance features of degenerate GdN semiconductor". Physics Letters A 381 22 (2017): 1905-1909. http://dx.doi.org/10.1016/j.physleta.2017.03.031.
    10.1016/j.physleta.2017.03.031
  6. Sharma, Dhananjay K.; Fateixa, Sara; Hortigüela, María J.; Vidyasagar, Reddithota; Otero-Irurueta, Gonzalo; Nogueira, Helena I.S.; Singh, Manoj Kumar; Kholkin, Andrei. "Defect concentration in nitrogen-doped graphene grown on Cu substrate: A thickness effect". Physica B: Condensed Matter 513 (2017): 62-68. http://dx.doi.org/10.1016/j.physb.2017.03.004.
    10.1016/j.physb.2017.03.004
  7. Vidyasagar, R.; Camargo, B.; Romanyuk, K.; Kholkin, A. L.. "Surface potential distribution of multilayer graphene using Kelvin probe and electric-field force microscopies". Ferroelectrics 508 1 (2017): 115-123. http://dx.doi.org/10.1080/00150193.2017.1289583.
    10.1080/00150193.2017.1289583
  8. Eknapakul, T.; Fongkaew, I.; Siriroj, S.; Vidyasagar, R.; Denlinger, J. D.; Bawden, L.; Mo, S.-K.; et al. "Nearly-free-electron system of monolayer Na on the surface of single-crystal HfSe2". Physical Review B 94 20 (2016): http://dx.doi.org/10.1103/physrevb.94.201121.
    10.1103/physrevb.94.201121
  9. Vidyasagar, R.; Alves Santos, O.; Holanda, J.; Cunha, R. O.; Machado, F. L. A.; Ribeiro, P. R. T.; Rodrigues, A. R.; et al. "Giant Zeeman shifts in the optical transitions of yttrium iron garnet thin films". Applied Physics Letters 109 12 (2016): 122402. http://dx.doi.org/10.1063/1.4962830.
    10.1063/1.4962830
  10. Ribeiro, P. R. T.; Ramírez, J. M. M.; Vidyasagar, R.; Machado, F. L. A.; Rezende, S. M.; Dahlberg, E. Dan. "GMI in the reentrant spin-glass Fe90Zr10 alloy: Investigation of the spin dynamics in the MHz frequency regime". Applied Physics Letters 109 10 (2016): 102404. http://dx.doi.org/10.1063/1.4962534.
    10.1063/1.4962534
  11. Coondoo, Indrani; Panwar, Neeraj; Vidyasagar, Reddithota; Kholkin, Andrei L.. "Defect chemistry and relaxation processes: effect of an amphoteric substituent in lead-free BCZT ceramics". Physical Chemistry Chemical Physics 18 45 (2016): 31184-31201. http://dx.doi.org/10.1039/c6cp06244j.
    10.1039/c6cp06244j
  12. Shimokawa, Tokuro; Fukuoka, Yohei; Fujisawa, Masashi; Zhang, Weimin; Okubo, Susumu; Sakurai, Takahiro; Ohta, Hitoshi; et al. "Microscopic properties of degradation-free capped GdN thin films studied by electron spin resonance". Journal of Applied Physics 117 4 (2015): 043909. http://dx.doi.org/10.1063/1.4906436.
    10.1063/1.4906436
  13. Vidyasagar, R.; Kita, T.; Sakurai, T.; Ohta, H.. "Electronic transitions in GdN band structure". Journal of Applied Physics 115 20 (2014): 203717. http://dx.doi.org/10.1063/1.4880398.
    10.1063/1.4880398
  14. Vidyasagar, R.; Kita, T.; Sakurai, T.; Ohta, H.. "Giant optical splitting in the spin-states assisting a sharp magnetic switching in GdN thin films". Applied Physics Letters 102 22 (2013): 222408. http://dx.doi.org/10.1063/1.4809758.
    10.1063/1.4809758
  15. Sagar, R Vidya; Yoshitomi, H; Kitayama, S; Kita, T; Ohta, H; Sakurai, T. "Magneto-optical effect in GdN epitaxial thin film". Journal of Physics: Conference Series 417 (2013): 012053. http://dx.doi.org/10.1088/1742-6596/417/1/012053.
    10.1088/1742-6596/417/1/012053
  16. Ichii, Kuniyuki; Kitayama, Shinya; Iwahashi, Shinya; Nakamura, Junya; Reddithota, Vidya Sagar; Kita, Takashi; Chigi, Yoshitaka; et al. "Correlation between local atomic structure and ultraviolet luminescence of AlGdN thin films". Journal of Physics: Conference Series 417 (2013): 012049. http://dx.doi.org/10.1088/1742-6596/417/1/012049.
    10.1088/1742-6596/417/1/012049
  17. Vidyasagar, Reddithota; Kitayama, Shinya; Yoshitomi, Hiroaki; Kita, Takashi; Sakurai, Takahiro; Ohta, Hitoshi. "Tuning optical and ferromagnetic properties of thin GdN films by nitrogen-vacancy centers". The European Physical Journal B 86 2 (2013): http://dx.doi.org/10.1140/epjb/e2012-30566-3.
    Aceite para publicação • 10.1140/epjb/e2012-30566-3
  18. Vidyasagar, R.; Lin, Y.-T.; Tu, L.-W.. "Spectroscopic and magnetic properties of Mn doped GaN epitaxial films grown by plasma assisted molecular beam epitaxy". Materials Research Bulletin 47 12 (2012): 4467-4471. http://dx.doi.org/10.1016/j.materresbull.2012.09.050.
    10.1016/j.materresbull.2012.09.050
  19. Yoshitomi, H.; Vidyasagar, R.; Kitayama, S.; Kita, T.; Ohta, H.; Okubo, S.; Fukuoka, Y.; Sakurai, T.. "Ferromagnetic properties of GdN thin films studied by temperature dependent circular polarized spectroscopy". Applied Physics Letters 101 7 (2012): 072403. http://dx.doi.org/10.1063/1.4746265.
    Aceite para publicação • 10.1063/1.4746265
  20. Yoshitomi, H.; Vidyasagar, R.; Kitayama, S.; Kita, T.; Ohta, H.; Okubo, S.; Fukuoka, Y.; Sakurai, T.. "Ferromagnetic properties of GdN thin films studied by temperature dependent circular polarized spectroscopy". Applied Physics Letters 101 7 (2012): 072403. http://dx.doi.org/10.1063/1.4746265.
    10.1063/1.4746265
  21. Vidyasagar, R.; Kitayama, S.; Yoshitomi, H.; Kita, T.; Sakurai, T.; Ohta, H.. "Study on spin-splitting phenomena in the band structure of GdN". Applied Physics Letters 100 23 (2012): 232410. http://dx.doi.org/10.1063/1.4727903.
    10.1063/1.4727903
  22. Sagar, R. Vidya. "Structural and Magnetic Properties of ZnO:(Mn, Co) Nanoparticles". Advanced Science, Engineering and Medicine 4 3 (2012): 237-240. http://dx.doi.org/10.1166/asem.2012.1149.
    Aceite para publicação • 10.1166/asem.2012.1149
  23. SAGAR, R. VIDYA; BUDDHUDU, S.. "STRUCTURAL AND PHOTOLUMINESCENCE PROPERTIES OF Co:ZnO NANOCRYSTALLINE POWDERS". International Journal of Nanoscience 10 03 (2011): 397-402. http://dx.doi.org/10.1142/s0219581x11008137.
    10.1142/s0219581x11008137
  24. Sagar, R.Vidya; Buddhudu, S.. "Synthesis and magnetic behaviour of Mn:ZnO nanocrystalline powders". Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 75 4 (2010): 1218-1222. http://dx.doi.org/10.1016/j.saa.2009.12.014.
    10.1016/j.saa.2009.12.014
  25. Vidya Sagar, R.; Buddhudu, S.. "Structural and photoluminescence analysis of Zn1-xMnxO nanocrystalline powders". Physics Letters A 373 35 (2009): 3184-3189. http://dx.doi.org/10.1016/j.physleta.2009.07.001.
    10.1016/j.physleta.2009.07.001
  26. Lakshminarayana, G.; Vidya Sagar, R.; Buddhudu, S.. "NIR luminescence from Er3+/Yb3+, Tm3+/Yb3+, Er3+/Tm3+ and Nd3+ ions-doped zincborotellurite glasses for optical amplification". Journal of Luminescence 128 4 (2008): 690-695. http://dx.doi.org/10.1016/j.jlumin.2007.11.081.
    10.1016/j.jlumin.2007.11.081
  27. Lakshminarayana, G.; Vidya Sagar, R.; Buddhudu, S.. "Emission analysis of Dy3+ and Pr3+:Bi2O3–ZnF2–B2O3–Li2O–Na2O glasses". Physica B: Condensed Matter 403 1 (2008): 81-86. http://dx.doi.org/10.1016/j.physb.2007.08.010.
    10.1016/j.physb.2007.08.010
Livro
  1. Reddithota, Vidyasagar. Investigations on Transition metal doped Semiconductors for spintronics. Saarbrucken, Alemanha: LAP LAMBERT Academic Publishing GMbH & Co. 2009.
    Publicado
Poster em conferência
  1. Reddithota, Vidyasagar. "Piezoelectric Actuation of Graphene- based polar structures ' Frequency and Geometry". Trabalho apresentado em 3rd International conference - Scanning Probe Microscopy, Institute of Natural Science and Mathematics, Ural Federal University, Russia,, 2019.
  2. KAKESHITA, T.. "Martensitic structural variants recovered by the magnetic fields in Fe2MnGa Heusler Alloys". Trabalho apresentado em 17th Czech and Slovak conference on Magnetism, UPJS, Kosice, Slovakia, 2019.
  3. Reddithota, Vidyasagar. "Nanoscale electromechanical properties of graphene". Trabalho apresentado em Research day, 2016.
  4. Reddithota, Vidyasagar. "Nanoscale electromechanical properties of graphene". Trabalho apresentado em Energy – Trends and Future Challenges-Jornadas, 2016.
  5. Vidyasagar, R.; Yoshitomi, H.; Kitayama, S.; Kita, T.; Ohta, H.; Sakurai, T.. "Evaluation of minority and majority spin band energies of ferromagnetic GdN thin film using optical absorption spectroscopy". Trabalho apresentado em 31st International Conference on the Physics of Semiconductors, Zurich, Germany, 2012.
    10.1063/1.4848417
  6. Reddithota, Vidyasagar. "Tuning Optical and Ferromagnetic Properties of GdN Thin Films by Nitrogen-Vacancy Centers". Trabalho apresentado em The 10th International Conference on Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials, Groningen, Netherland, 2012.
  7. Reddithota, Vidyasagar. "Correlation Between Local Atomic Structure and Ultra Violet Luminescence of AlGdN Thin Films". Trabalho apresentado em 15th International Conference on Thin Films, Kyoto, Japan, 2011.
  8. Reddithota, Vidyasagar. "Magneto-optical Effect in GdN Epitaxial Thin Films". Trabalho apresentado em 15th International Conference on Thin Films, Kyoto, Japan, 2011.
  9. Reddithota, Vidyasagar. "The effect of Mn doped on structural and optical properties of GaN". Trabalho apresentado em MBE Taiwan 2010, National Taiwan University, Taipei, Taiwan, 2010.
  10. Reddithota, Vidyasagar. "Room Temperature Ferromagnetism in Cobalt-substituted Zinc Oxide nanoparticles for spintronics applications". Trabalho apresentado em 1st International Conference on Multifunctional, Hybrid and Nanomaterials, 2009.
  11. Reddithota, Vidyasagar. "Structural and photoluminescence properties of (Mn, Co) doped ZnO nanopowders". Trabalho apresentado em National Conference on Emerging Materials, Devices and Technologies, 2009.
  12. Reddithota, Vidyasagar. "The structural and photoluminescence properties of (Mn, Co) doped ZnO nanoparticles". Trabalho apresentado em 6th International Conference on Inorganic Materials, 2008.
  13. Karmakar, R.; Neogi, S. K.; Bandyopadhyay, S.; Banerjee, Aritra. "Optical analysis of Zn1-xCoxO". Trabalho apresentado em National conference on Advanced Materials, Devices and Technologies, 2008.
  14. Reddithota, Vidyasagar. "Synthesis & Photoluminescence analysis of Mn2+: ZnO nanopowders for optoelectronics applications". Trabalho apresentado em International conference on Advances in Energy Systems (ICAES - 2007), 2007.

Outros

Outra produção
  1. Advanced Research Insights in Optical Materials and Photonics. Wiley publications advisory board members was examine the present and future of photonics, and the impact of this exciting field on technology. Their talks will be followed by an engaging panel discussion among our expert guests, was answered to the questions of the candidates.. 2021. R Vidyasagar. https://register.gotowebinar.com/register/4198884685973037579?source=Email+1&elq_mid=50855&elq_cid=2489674&utm_campaign=32040&utm_source=eloquaEmail&utm_medium=email&utm_content=EM1_Advanced%20Optical%20and%20Photonics_RM-CMAN_AOM_Advanced%20Optical%20and.
  2. Emerging Materials for Energy and Environmental Applications - Series-I. I have participated on webinar series on "Emerging Materials for Energy and Environmental Applications - Series-I " organized by CSIR-NEERI, Nagpur, India.. 2020. Reddithota, Vidyasagar. https://www.youtube.com/watch?v=yyL5PrA-pYo.
  3. FerroTalks Webinar Series. I have participated a bi-monthly webinar series on various topics related to the processing, characterization, structure, or modeling of ferroelectrics, organized by Tutorials and Education Chair of the Ferroelectrics Standing Committe (IEEE UFFC) and the director of the GRK2495. These short tutorial hold live via Zoom by various leading experts from around the world.. 2020. Reddithota, Vidyasagar. https://www.ww.tf.fau.de/2020/07/01/ferro-talks/.
Atividades

Apresentação oral de trabalho

Título da apresentação Nome do evento
Anfitrião (Local do evento)
2013/09/16 Large Optical Spin-splitting in the GdN Electronic states JSAP-MRS Joint Symposia, Doshishya University, Kyoto, Japan,
Materials Research Society (Kyoto, Japão)
2012/04/09 Analysis of Spin splitting in Ferromagnetic GdN Epitaxial Thin Films MRS Spring Meeting and Exhibit
Materials Research Society (San Francisco, Estados Unidos)
2012/03/24 Improvement of Optical and Ferromagnetic Properties by Nitrogen Vacancies within Rock-salt GdN Thin Films Japan Society for Materials Science Semiconductor Electronics Division Committee 2011 2nd meeting, Kyoto Institute of Technology
Japan Society for Materials Science Semiconductor Electronics Division (Kyoto, Japão)
2010/12/03 Photoluminescence and Raman scattering analysis of Mn doped GaN epitaxial films by plasma-assisted molecular beam epitaxy International Conference on Optics & photonics Taiwan (OPT'10)
Southern Taiwan University (Tainan , Taiwan)
2008/12/16 Structural and Magnetic Properties of Co:ZnO Nanopowders for Spintronics Applications Proceeding of 53rd DAE-Solid State Physics Symposium
Technical Physics & Prototype Engineering Division, BARC (Mumbai, Índia)
2008/02/27 The effect of Cobalt doping on synthesis, structural and photoluminescence properties of ZnO nanopowders for opto-electronics applications International conference on Nanoscience and Nanotechnology (ICONSAT-2008)
Indira Gandhi Centre for Atomic Research (Kalpakkam, Índia)
Distinções

Prémio

2016 Best Poster Award
Universidade de Aveiro, Portugal