Features of Relaxation of the Remanent Magnetization of Antiferromagnetic Nanoparticles by the Example of Ferrihydrite

被引：4
作者：
Balaev, D. A. [1 ,2 ]
Krasikov, A. A. [1 ]
Balaev, A. D. [1 ]
Stolyar, S. V. [1 ,2 ,3 ]
Ladygina, V. P. [2 ]
Iskhakov, R. S. [1 ]
机构：
[1] Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
[2] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[3] Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia
来源：
PHYSICS OF THE SOLID STATE | 2020年 / 62卷 / 07期
关键词：
antiferromagnetic nanoparticles; ferrihydrite; exchange bias; magnetization relaxation; EXCHANGE-BIAS; NIO NANOPARTICLES; HYSTERESIS ANOMALIES; PARTICLE-SIZE; TEMPERATURE; DEPENDENCE; SUBSYSTEMS; RESONANCE; STATE; SPIN;
D O I：
10.1134/S1063783420070033
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The relaxation of the remanent magnetization of antiferromagnetically ordered ferrihydrite nanoparticles at the exchange bias effect implemented in these systems has been investigated. The magnetization relaxation depends logarithmically on time, which is typical of the thermally activated hoppings of particle magnetic moments through the potential barriers caused by the magnetic anisotropy. The barrier energy obtained by processing of the remanent magnetization relaxation data under the field cooling conditions significantly exceeds the barrier energy under standard (zero field cooling) conditions. The observed difference points out the possibility of using the remanent magnetization relaxation to analyze the mechanisms responsible for the exchange bias effect in antiferromagnetic nanoparticles and measure the parameters of the exchange coupling of magnetic subsystems in such objects.
引用
收藏
页码：1172 / 1178
页数：7
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