Open Access Open Access  Restricted Access Subscription Access

Electric Field Controlled Magnetic Properties in Diluted Magnetic Semiconductor


Affiliations
1 Department of Physics, Addis Ababa University, Ethiopia
 

We report the effect of external electric field (EEF) on the magnetic properties of MnxGe1-x, diluted magnetic semiconductor (DMS). We present a Kondo Lattice Model (KLM) type Hamiltonian with exchange coupling between localized spins, itinerant holes and the EEF. The magnetization, the dispersion and critical temperature (Tc) are calculated for different values of EEF parameters (α) using double time temperature dependent Green function formalism. The enhancement of the (Tc) with the EEF is shown to be a very distinct and is in agreement with recent experimental observation and much required for spintronics applications and devices.

Keywords

Diluted Magnetic Semiconductor, Spintronics, Electric Field Control of Ferromagnetism, Green Function.
User
Notifications
Font Size


  • A.P. Li, J. Shen, J.R. Thompson and H.H. Weitering (2005), Ferromagnetic percolation in MnxGe1-x dilute magnetic semiconductor, Appl. Phys. Lett. 86, 152507 .
  • D Chiba and T Ono (2013) , Control of magnetism in Co by an elect ric field, J. Phys. D: Appl. Phys. 46, 213001 (11pp)
  • D.N. Zubarev (1960), Usp. Fiz. Nauk 71, 71 [English Translation: (1960), Sov. Phs. Usp. 3, 320 ]
  • Dang Duc Dung, Nguyen Thi Mua, Hoang Vu Chung and Sunglae Cho (2012), Novel Mn-doped Ge: From Basis to Application, Journal of Materials Science and Engineering A 2 (2), 248 -271
  • F. Xiu, Y. Wang, J. Kim, A. Hong, J. Tang, A.P. Jacob, et al. (2010), Electric-field controlled ferromagnetism in high-Curie-temperature Mn0.05Ge0.95 quantum dots, Nature Mater. 9 337-344.
  • H. Boukari, P. Kossacki, M. Bertolini, D. Ferrand, J. Cibert, S. Tatarenko, A. Wasiela, J.A. Gaj, and T. Dietl(2002), Light and Electric Field Control of Ferromagnetism in Magnetic Quantum Structures, Phys. Rev.B ,88, 207204.
  • H. Ohno, D. Chiba, F. Matsukura, T. Omiya, E. Abe, T. Dietl, Y. Ohnoand K. Ohtani (2000), Electric Field control of ferromagnetism, Nature 408, 944.
  • H. Ohno (1998), Making Nonmagnetic Semiconductors Ferromagnetic, Science 281 951.
  • J. I. Climente, M. Korkusinski, P. Hawrylak, J. Planelles (2005), Voltage cont rol of the magnetic properties of charged semiconductor quantum dots containing magnetic ions, Phys. Rev. B 71, 125321..
  • S. H. Song, S. H. Lim, M. H. Jung T. S. Santos and J. S. Moodera (2006), Magnetic and Transport Properties of Amorphous Ge-Mn Thin Films, Journal of the Korean Physical Society, Vol. 49, No. 6, 23 86.
  • S.A. Wolf, D.D. Awschalom, R.A. Buhrman, J.M.Daughton, S.von Molnar,M.L.Roukes, A.Y. Chtchelkanova and D.M. Treger (2001), Spintronics: a spin-based electronics vision for the future, Science 294, 1488.
  • S.Cho, S. Choi, S.C. Hong,Y. Kim, J.B. Ketterson, B.J. Kim, Y.C.Kim, and J.H. Jung (2002), Ferromagnetism in Mn-doped Ge ,Phys. Rev. B 66, 033303..
  • Y.D. Park, A.T. Hanbicki, S,C. Erwin, C.S. Hellberg, J.M. Sullivan, J.E. Mattson, T.F. Ambrose, A. Wilson, G. Spanos and B.T. Jonker (2002), A Group-IV Ferromagnetic Semiconductor: MnxGe1-x, Science 295, 651-654.
  • D Chiba and T Ono (2013) , Control of magnetism in Co by an elect ric field, J. Phys. D: Appl. Phys. 46, 213001 (11pp)

Abstract Views: 136

PDF Views: 45




  • Electric Field Controlled Magnetic Properties in Diluted Magnetic Semiconductor

Abstract Views: 136  |  PDF Views: 45

Authors

Gezahegn Assefa
Department of Physics, Addis Ababa University, Ethiopia
P. Singh
Department of Physics, Addis Ababa University, Ethiopia

Abstract


We report the effect of external electric field (EEF) on the magnetic properties of MnxGe1-x, diluted magnetic semiconductor (DMS). We present a Kondo Lattice Model (KLM) type Hamiltonian with exchange coupling between localized spins, itinerant holes and the EEF. The magnetization, the dispersion and critical temperature (Tc) are calculated for different values of EEF parameters (α) using double time temperature dependent Green function formalism. The enhancement of the (Tc) with the EEF is shown to be a very distinct and is in agreement with recent experimental observation and much required for spintronics applications and devices.

Keywords


Diluted Magnetic Semiconductor, Spintronics, Electric Field Control of Ferromagnetism, Green Function.

References