Kim Jong Hyuk, Kim Mi Kyung, Jeong Ki Won, Shin Hyun Jun, Hong Jae Min, Kim Jin Seok, Moon Kyungsun, Lee Nara, Choi Young Jai
Department of Physics, Yonsei University, Seoul, 03722, Korea.
Sci Rep. 2022 Jul 27;12(1):12866. doi: 10.1038/s41598-022-17206-y.
Spin-flip transition can occur in antiferromagnets with strong magnetocrystalline anisotropy, inducing a significant modification of the anisotropic magnetic properties through phase conversion. In contrast to ferromagnets, antiferromagnets have not been thoroughly examined in terms of their anisotropic characteristics. We investigated the magnetic-field and angle-dependent magnetic properties of Ising-type antiferromagnetic CaSrCoAs using magnetic torque measurements. An A-type antiferromagnetic order emerges below T = 97 K aligned along the magnetically easy c-axis. The reversal of the angle-dependent torque across the spin-flip transition was observed, revealing the strong influence of the magnetocrystalline anisotropy on the magnetic properties. Based on the easy-axis anisotropic spin model, we theoretically generated torque data and identified specific spin configurations associated with the magnetic torque variation in the presence of a rotating magnetic field. Our results enrich fundamental and applied research on diverse antiferromagnetic compounds by shedding new light on the distinct magnetic features of the Ising-type antiferromagnet.
自旋翻转转变可发生在具有强磁晶各向异性的反铁磁体中，通过相变引起各向异性磁性能的显著改变。与铁磁体不同，反铁磁体的各向异性特征尚未得到充分研究。我们使用磁转矩测量研究了伊辛型反铁磁体CaSrCoAs的磁场和角度相关磁性能。在T = 97 K以下出现沿磁易c轴排列的A型反铁磁序。观察到自旋翻转转变时角度相关转矩的反转，揭示了磁晶各向异性对磁性能的强烈影响。基于易轴各向异性自旋模型，我们从理论上生成了转矩数据，并确定了在旋转磁场存在下与磁转矩变化相关的特定自旋构型。我们的结果通过揭示伊辛型反铁磁体独特的磁特性，丰富了对各种反铁磁化合物的基础研究和应用研究。
