论文标题
由反铁磁旋转驱动的铁磁性自发旋转
Spontaneous Rotation of Ferrimagnetism Driven by Antiferromagnetic Spin Canting
论文作者
论文摘要
涉及晶体$'$ s磁化的旋转旋转相变的旋转晶体相变已在扭曲的玻璃岩氧化物（如矫正甲甲）中得到很好的特征。在这些系统中，由于$ f $ -D $ Exchange结合了竞争的稀土和过渡金属各向异性，因此旋转重新定向发生。在这里，我们演示了扭曲的钙钛矿中自旋重新定向的替代范式。我们表明，$ r_2 \ mathrm {cumnmn_4o_ {12}} $（r = y或dy）三重A位柱列订购的四倍perovskite具有三个有序的磁性阶段，最多可进行两个旋转重晶相变。与其他扭曲的钙棍蛋白酶中的旋转抗压现象不同，这些过渡与稀土磁性无关，但却是由于对沮丧的Heisenberg交换互动的不稳定性而驱动的，而dzyaloshinskii-moriya and Single-Moriya and-single-ion-ion-iropropropropropropsies。
Spin-reorientation phase transitions that involve the rotation of a crystal$'$s magnetization have been well characterized in distorted-perovskite oxides such as the orthoferrites. In these systems spin reorientation occurs due to competing rare-earth and transition metal anisotropies coupled via $f$-$d$ exchange. Here, we demonstrate an alternative paradigm for spin reorientation in distorted perovskites. We show that the $R_2\mathrm{CuMnMn_4O_{12}}$ (R = Y or Dy) triple A-site columnar-ordered quadruple perovskites have three ordered magnetic phases and up to two spin-reorientation phase transitions. Unlike the spin-reorientation phenomena in other distorted perovskites, these transitions are independent of rare-earth magnetism, but are instead driven by an instability towards antiferromagnetic spin canting likely originating in frustrated Heisenberg exchange interactions, and the competition between Dzyaloshinskii-Moriya and single-ion anisotropies.
