磁场诱导尖晶石钒的转变。
Magnetic field induced transition in vanadium spinels.
机构信息
NHMFL Materials Physics and Applications, T-4 and CNLS, Los Alamos Laboratory (LANL), Los Alamos, New Mexico 87545, USA.
Theoretical Division, T-4 and CNLS, Los Alamos Laboratory, Los Alamos, New Mexico 87545, USA.
出版信息
Phys Rev Lett. 2014 Jan 10;112(1):017207. doi: 10.1103/PhysRevLett.112.017207.
We study vanadium spinels AV2O4 (A = Cd,Mg) in pulsed magnetic fields up to 65 T. A jump in magnetization at μ0H≈40 T is observed in the single-crystal MgV2O4, indicating a field induced quantum phase transition between two distinct magnetic orders. In the multiferroic CdV2O4, the field induced transition is accompanied by a suppression of the electric polarization. By modeling the magnetic properties in the presence of strong spin-orbit coupling characteristic of vanadium spinels, we show that both features of the field induced transition can be successfully explained by including the effects of the local trigonal crystal field.
我们在高达 65 T 的脉冲磁场中研究了钒尖晶石 AV2O4（A = Cd，Mg）。在单晶 MgV2O4 中观察到在 μ0H≈40 T 时磁化强度发生跳跃，表明在两种不同磁序之间发生了磁场诱导的量子相变。在多铁性 CdV2O4 中，磁场诱导的转变伴随着电极化的抑制。通过对具有钒尖晶石特征的强自旋轨道耦合存在时的磁性进行建模，我们表明通过包含局部三角晶体场的影响，可以成功解释磁场诱导转变的这两个特征。
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