Magnetic Response of Conduction Electrons in Nonmagnetic YB6, LaB6, and YbB6 Hexaborides with Electronic and Structural Instabilities

IF 1 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Journal of Experimental and Theoretical Physics Pub Date : 2023-10-26 DOI:10.1134/S1063776123090133

N. E. Sluchanko, A. V. Kuznetsov, A. N. Azarevich, A. V. Bogach, N. Yu. Shitsevalova, S. E. Polovets, B. V. Filipov, A. Yu. Tsvetkov, S. Yu. Gavrilkin

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Abstract

A detailed investigation of contributions to the magnetization of nonmagnetic YB₆, LaB₆, and YbB₆ hexaboride single crystals has been performed, and a procedure for their separation has been proposed. It has been shown that a low value of electronic susceptibility χ_e(T) in YB₆ and LaB₆ hexaborides seems to be associated with a small effective mass of band carriers, m* ~ 0.5m₀. As a result of this, the Pauli component and Landau diamagnetism cancel each other. It has been found that χ_e(T) varies in the intervals T < T* (T* ~ 50 K) and T > 150 K, which are attributed to an order–disorder transition below T* and a carriers-related contribution due to the Jahn–Teller structural instability of the boron frame work.

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具有电子和结构不稳定性的非磁性YB6、LaB6和YbB6六硼化物中导电电子的磁响应

对非磁性YB6、LaB6和YbB6六硼化物单晶的磁化作用进行了详细的研究，并提出了分离它们的方法。研究表明，YB6和LaB6六硼化物的低电子磁化率χ。因此，泡利分量和朗道抗磁性相互抵消。已经发现χe（T）在区间T<；T*（T*~50K）和T>；150 K，这归因于T*以下的有序-无序转变，以及由于硼框架结构的Jahn–Teller结构不稳定性而产生的载流子相关贡献。

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来源期刊

Journal of Experimental and Theoretical Physics 物理-物理：综合

CiteScore

1.90

自引率

9.10%

发文量

130

审稿时长

3-6 weeks

期刊介绍： Journal of Experimental and Theoretical Physics is one of the most influential physics research journals. Originally based on Russia, this international journal now welcomes manuscripts from all countries in the English or Russian language. It publishes original papers on fundamental theoretical and experimental research in all fields of physics: from solids and liquids to elementary particles and astrophysics.