期刊
NATURE PHYSICS
卷 17, 期 4, 页码 525-+出版社
NATURE RESEARCH
DOI: 10.1038/s41567-020-01123-w
关键词
-
资金
- Center for Novel Pathways for Novel Pathways to Quantum Coherence in Materials, an Energy Frontier Research Center - United States Department of Energy, Office of Science, Basic Energy Sciences
- EPiQS Initiative of the Gordon and Betty Moore Foundation [GBMF9067]
- National Science Foundation [DMR-1644779, DMR-1611525]
- State of Florida
- Office of Science User Facility of the Department of Energy [DE-AC02-05CH11231]
The study reveals a giant exchange bias within a disordered antiferromagnet, arising from a spin-glass phase. Tuning the relative strengths of the spin-glass and antiferromagnetic order parameters allows for tailoring the exchange bias.
Exchange bias is a property of widespread technological utility, but its underlying mechanism remains elusive, in part because it is rooted in the interaction of coexisting order parameters in the presence of complex magnetic disorder. Here we show that a giant exchange bias housed within a spin-glass phase arises in a disordered antiferromagnet. The magnitude and robustness of the exchange bias emerges from a convolution of two energetic landscapes, namely the highly degenerate landscape of the spin glass biased by the sublattice spin configuration of the antiferromagnet. The former provides a source of uncompensated moment, whereas the latter provides a mechanism for its pinning, which leads to the exchange bias. Tuning the relative strengths of the spin-glass and antiferromagnetic order parameters reveals a principle for tailoring the exchange bias, with potential applications to spintronic technologies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据