Magnon spin transport in the van der Waals antiferromagnet CrPS4 for noncollinear and collinear magnetization

被引：3

作者：

de Wal, Dennis K. ^{[1
]}

Zohaib, Muhammad ^{[1
]}

van Wees, Bart J. ^{[1
]}

机构：

[1] Univ Groningen, Zernike Inst Adv Mat, Nijenborgh 3, NL-9747 AG Groningen, Netherlands

来源：

PHYSICAL REVIEW B | 2024年 / 110卷 / 17期

基金：

欧洲研究理事会; 欧盟地平线“2020”;

关键词：

Antiferromagnets - Collinear state - In-plane fields - In-plane magnetic fields - Magnon modes - Noncollinear - Nonlocal - Spin flip - Spin transport - Van der Waal;

D O I：

10.1103/PhysRevB.110.174440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigate the injection, transport, and detection of magnon spins in the van der Waals antiferromagnet chromium thiophosphate (CrPS4). We electrically and thermally inject magnon spins by platinum contacts and examine the nonlocal resistance as a function of in-plane magnetic field up to 12 Tesla. We observe a large nonlocal resistance from both the electrically and thermally excited magnon modes above the spin-flip field where CrPS4 is in the collinear state. At 25 K for an in-plane field of range 5-12 T, we extract the magnon relaxation length lambda m ranging 200-800 nm and a typical magnon conductivity of sigma m approximate to 1 x 104 Sm-1, which is one order of magnitude smaller than in yttrium iron garnet (YIG) films at room temperature. Moreover, we find that sigma m is almost zero for CrPS4 in the noncollinear state. In addition the nonlocal spin Seebeck effect shows a complex behavior as a function of field. Our results open up the way to understanding the role of the antiferromagnetic magnon modes on spin injection into antiferromagnets and implementation of two-dimensional magnets for scalable magnonic circuits.

引用

页数：7