Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials
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Date
2004-05-14
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Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
Based on experimental observations of modulated magnetic patterns in a Co(0.5)Ni(0.205)Ga(0.295) alloy, we propose a model to describe a ( purely) magnetic tweed and a magnetoelastic tweed. The former arises above the Curie (or Neel) temperature due to magnetic disorder. The latter results from compositional fluctuations coupling to strain and then to magnetism through the magnetoelastic interaction above the structural transition temperature. We discuss the origin of purely magnetic and magnetoelastic precursor modulations and their experimental thermodynamic signatures.
Description
Keywords
Shape-memory alloys, Martensitic transformations, Phase transitions, Behavior, AL, Scattering, Disorders, ni2mnga, Driven, Physics
Citation
Saxena, A ; Castan, T ; Planes, A ; et al., May 14, 2004. “Origin of magnetic and magnetoelastic tweedlike precursor modulations in ferroic materials,” PHYSICAL REVIEW LETTERS 92(19): 197203. DOI: 10.1103/PhysRevLett.92.197203