Ferromagnetic material CdGeP2:Mn for spintronics |
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| Authors: | V. M. Novotortsev S. A. Varnavskii S. F. Marenkin L. I. Koroleva R. V. Demin V. M. Trukhan S. O. Klimonskii V. D. Kuznetsov |
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| Affiliation: | (1) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia;(2) Moscow State University, Vorob’evy gory, Moscow, 119992, Russia;(3) Institute of Solid-State and Semiconductor Physics, National Academy of Sciences of Belarus, ul. Brovki 17, Minsk, 2200072, Belarus;(4) Mendeleev University of Chemical Technology, Miusskaya pl. 9, Moscow, 125047, Russia |
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| Abstract: | Solid solutions Cd1?x MnxGeP2 (x=0?0.19) have been synthesized and identified. In these solutions, the unit cell parameters decrease with an increase in the manganese content. The solid solution Cd0.81Mn0.19GeP2 is a ferromagnet with the Curie temperature T C ≈ 311 K. The paramagnetic moment of Mn2+ ions equal to 5.8 μB, as well as the spontaneous magnetization constituting 76% of the total magnetization of a crystal, has been determined with the use of the Langevin function. The origin of ferromagnetism in CdGeP2:Mn is exchange mediated by charge carriers (holes). These holes are caused by cationic defects in the structure of chalcopyrite. |
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