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Title: Neutron diffraction study of the magnetic-field-induced transition in Mn{sub 3}GaC

The antiperovskite Mn{sub 3}GaC undergoes an isostructural cubic–cubic first order transition from a low-temperature, large-cell-volume antiferromagnetic state to a high-temperature, small-cell-volume ferromagnetic state at around 160 K. The transition can also be induced by applying a magnetic field. We study here the isothermal magnetic-field-evolution of the transition as ferromagnetism is stabilized at the expense of antiferromagnetism. We make use of the presence of the two distinct cell volumes of the two magnetic states as a probe to observe by neutron diffraction the evolution of the transition, as the external magnetic field carries the system from the antiferromagnetic to the ferromagnetic state. We show that the large-volume antiferromagnetic and the small-volume ferromagnetic states coexist in the temperature range of the transition. The ferromagnetic state is progressively stabilized as the field increases.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4]
  1. Physics Department, Yildiz Technical University, TR-34220 Esenler, Istanbul (Turkey)
  2. (Turkey)
  3. Faculty of Physics and CENIDE, Universität Duisburg-Essen, D-47048 Duisburg (Germany)
  4. Forschungsneutronenquelle Heinz Maier-Leibnitz FRM-II, Technische Universität München, D-85747 Garching bei München (Germany)
Publication Date:
OSTI Identifier:
22275640
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; CUBIC LATTICES; FERROMAGNETISM; GALLIUM CARBIDES; MAGNETIC FIELDS; MANGANESE COMPOUNDS; NEUTRON DIFFRACTION; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE