Nonequilibrium magnetic properties in oxygen-rich LaMnO3 nanoparticles

被引：3

作者：

Xue, Kaiyuan ^{[1
]}

He, Feifei ^{[1
]}

Zhang, Jiang ^{[1
]}

Tang, Lingyun ^{[1
]}

Chen, Xi ^{[1
]}

Mao, Zhongquan ^{[1
]}

机构：

[1] South China Univ Technol, Sch Phys & Optoelect, Guangzhou, Guangdong, Peoples R China

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2019年 / 31卷 / 35期

关键词：

nonequilibrium property; spin glass; irreversible phenomenon; magnetic nanoparticle; BEHAVIOR; PHASE; STATE;

D O I：

10.1088/1361-648X/ab22e9

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Nonequilibrium magnetic properties of oxygen-rich LaMnO3.21 nanoparticles have been investigated by comprehensive magnetic measurements. The composition falls in the metamagnetic canted spin region of the magnetic phase diagram. However, the zero-fieldcooling memory effect and frequency-dependent AC susceptibility reveal a re-entrant glassy state at low temperature. In contrast to the super-spin glass or cluster glass that re-enter from the high-temperature ferromagnetic state in previous studies, analyses based on the power law and Vogel-Fulcher law indicate strongly a conventional spin glass nature. As the magnetic field increases, an anomalous enhancement of the irreversible temperature is observed, suggesting a field-induced nonequilibrium magnetic state. These results can be understood by considering the interaction between the antiferromagnetic clusters and the metamagnetic canted-spin matrix inside the nanoparticles.

引用

页数：6

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