Lee Nara, Kim Jong Hyuk, Oh Dong Gun, Shin Hyun Jun, Choi Hwan Young, Choi Sungkyun, Jo Younjung, Choi Young Jai
Department of Physics, Yonsei University, Seoul, 03722, Korea.
Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea.
Sci Rep. 2021 Apr 30;11(1):9408. doi: 10.1038/s41598-021-88950-w.
Magnetic properties can be manipulated to enhance certain functionalities by tuning different material processing parameters. Here, we present the controllable magnetization steps of hysteresis loops in double-perovskite single crystals of EuCoMnO. Ferromagnetic order emerges below T ≈ 122 K along the crystallographic c axis. The difficulty in altering Co and Mn ions naturally induces additional antiferromagnetic clusters in this system. Annealing the crystals in different gas environments modifies the mixed magnetic state, and results in the retardation (after O-annealing) and bifurcation (after Ar-annealing) of the magnetization steps of isothermal magnetization. This remarkable variation offers an efficient approach for improving the magnetic properties of double-perovskite oxides.
通过调整不同的材料加工参数，可以操纵磁性以增强某些功能。在此，我们展示了EuCoMnO双钙钛矿单晶中磁滞回线的可控磁化步骤。在T≈122K以下沿晶体学c轴出现铁磁序。改变Co和Mn离子的困难自然会在该系统中诱导额外的反铁磁团簇。在不同气体环境中对晶体进行退火会改变混合磁状态，并导致等温磁化的磁化步骤出现延迟（O退火后）和分叉（Ar退火后）。这种显著的变化为改善双钙钛矿氧化物的磁性提供了一种有效方法。
