Giant Magnetoelastic Coupling in a Metallic Helical Metamagnet

2010/03/31 by A. Barcza, Alexander Barcza, Z. Gercsi +3 · 3 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Composite material #Condensed matter physics #Coupling (piping) #Creep #Diffraction #Magnet #Magnetic Properties of Alloys #Magnetic and transport properties of perovskites and related materials #Materials science #Metal #Neutron diffraction #Optics #Physics #Thermal #Thermal expansion #Thermodynamics #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.104.247202

published as Phys. Rev. Lett. 104, 247202 (2010) · 5 pages, 4 figures (3 in colour)

arxiv created 2010/05/25 · openalex publication_date 2010/06/14 · arxiv updated 2010/06/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

Using high resolution neutron diffraction and capacitance dilatometry we show that the thermal evolution of the helimagnetic state in CoMnSi is accompanied by a change in interatomic distances of up to 2%, the largest ever found in a metallic magnet. Our results and the picture of competing exchange and strongly anisotropic thermal expansion that we use to understand them sheds light on a new mechanism for large magnetoelastic effects that does not require large spin-orbit coupling.

Citations

• VESTA: a three-dimensional visualization system for electronic and structural analysis
• Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis set

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