Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

A new high-T C ferromagnet: Manganese-doped CdGeAs2 chalcopyrite

Abstract

New ferromagnets with high Curie temperatures, reaching 355 K, have been obtained by doping a GdGeAs2 semiconductor compound with manganese. The obtained compounds are magnetically inhomogeneous, comprising a mixture of ferromagnetic (FM) and paramagnetic phases. The volume fraction of the FM phase increases with the degree of doping. The development of ferromagnetism in this system is probably related to the presence of vacancies of the (Cd, VC, Mn)GeAs2 type or to a nonstoichiometry of the (Cd, Ge, Mn)GeAs2 type, since theoretical estimates show that the FM state is energetically more favorable than the spin glass state only in these cases.

This is a preview of subscription content, log in to check access.

References

  1. 1.

    H. Ohno, Science 281, 951 (1998).

  2. 2.

    G. A. Prinz, Science 282, 1660 (1998).

  3. 3.

    G. A. Medvedkin, T. Ishibashi, T. Nishi, et al., Jpn. J. Appl. Phys. 39, L949 (2000).

  4. 4.

    G. A. Medvedkin, K. Hirose, T. Ishibashi, et al., J. Cryst. Growth 236, 609 (2002).

  5. 5.

    K. Sato, G. A. Medvedkin, T. Nishi, et al., J. Appl. Phys. 89, 7027 (2001).

  6. 6.

    S. Choi, G.-B. Cha, S. C. Hong, et al., Solid State Commun. 122, 165 (2002).

  7. 7.

    H. Akai, Phys. Rev. Lett. 81, 3002 (1998).

  8. 8.

    H. Akai, T. Kamatani, and S. Watanabe, J. Phys. Soc. Jpn. 69 (Suppl. A), 112 (2000).

  9. 9.

    Y.-J. Zhao, W. T. Geng, A. J. Freeman, and T. Oguchi, Phys. Rev. B 63, 201202(R) (2001).

  10. 10.

    K. Sato, G. A. Medvedkin, T. Ishibashi, et al., J. Phys. Chem. Sol. 64, 1461 (2003).

Download references

Author information

Additional information

__________

Translated from Pis’ma v Zhurnal Tekhnichesko\({{P_{As_4 } } \mathord{\left/ {\vphantom {{P_{As_4 } } {P_{Ga} }}} \right. \kern-\nulldelimiterspace} {P_{Ga} }} = \gamma \) Fiziki, Vol. 30, No. 21, 2004, pp. 81–87.

Original Russian Text Copyright © 2004 by Demin, Koroleva, Marenkin, Mikhailov, Novotortsev, Kalinnikov, Aminov, R. Szymczak, H. Szymczak, Baran.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Demin, R.V., Koroleva, L.I., Marenkin, S.F. et al. A new high-T C ferromagnet: Manganese-doped CdGeAs2 chalcopyrite. Tech. Phys. Lett. 30, 924–926 (2004). https://doi.org/10.1134/1.1829344

Download citation

Keywords

  • Manganese
  • Chalcopyrite
  • Curie Temperature
  • Theoretical Estimate
  • Spin Glass