Dzyaloshinskii-Moriya磁体Ba2CuGe2O7的旋转磁弹性相互作用

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review B Pub Date : 2025-06-06 DOI:10.1103/physrevb.111.224411

J. Sourd, T. Kotte, P. Wild, S. Mühlbauer, J. Wosnitza, S. Zherlitsyn

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引用次数: 0

摘要

我们报道了沿晶体学[001]轴施加磁场的低温下Ba2CuGe2O7单晶的磁弹性性质。我们的结果扩展到低温，由中子散射确定的这种化合物的H - T相图。此外，我们观察到特定的弹性模式对各种磁跃迁更敏感。特别是，我们观察到（001）平面的横向声模式与低场的摆线秩序之间存在不寻常的耦合，这表明该化合物的自旋应变机制起源于Dzyaloshinskii-Moriya相互作用。2025年由美国物理学会出版

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Rotational magnetoelastic interactions in the Dzyaloshinskii-Moriya magnet Ba2CuGe2O7

We report the magnetoelastic properties of a Ba2CuGe2O7 single crystal at low temperatures under a magnetic field applied along the crystallographic [001] axis. Our results extend to low temperatures, the H−T phase diagram determined for this compound by neutron scattering. Furthermore, we observe that specific elastic modes are more sensitive to the various magnetic transitions. In particular, we observe an unusual coupling between the transverse acoustic mode in the (001) plane and the cycloidal order at low field, which suggests a spin-strain mechanism originating from Dzyaloshinskii-Moriya interaction in this compound.

Published by the American Physical Society

2025

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter