Anisotropy of the magnetic properties and the electronic structure of transition-metal diborides

被引:11
|
作者
Fedorchenko, A. V. [1 ]
Grechnev, G. E. [1 ]
Panfilov, A. S. [1 ]
Logosha, A. V. [1 ]
Svechkarev, I. V. [1 ]
Filippov, V. B. [2 ]
Lyashchenko, A. B. [2 ]
Evdokimova, A. V. [2 ]
机构
[1] Natl Acad Sci Ukraine, BI Verkin Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] IN Frantsevich Inst Mat Sci, UA-03680 Kiev, Ukraine
关键词
SUSCEPTIBILITY; TEMPERATURE; SCB2;
D O I
10.1063/1.3266916
中图分类号
O59 [应用物理学];
学科分类号
摘要
The temperature dependences of the magnetic susceptibility chi and its anisotropy Delta chi=chi(parallel to)-chi(perpendicular to) have been measured for hexagonal single crystals of transition-metal dibofides MB2 (M=Sc, Ti, V, Zr, Hf) in the temperature interval 4.2-300 K. It is found that the anisotropy Delta chi is weakly temperature-dependent, a nonmonotonic function of the filling of the hybridized p-d conduction band, and largest for group-IV transition metals. First-principles calculations of the electronic structure of dibofides and the values of the paramagnetic contributions (spin and Van Vleck) to their susceptibility show that the behavior of the magnetic anisotropy is due to the competition between Van Vleck paramagnetism and orbital diamagnetism of the conduction electrons. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3266916]
引用
收藏
页码:862 / 868
页数:7
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