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Title: Investigating the magnetovolume effect in isotropic body-centered-cubic iron using spin-lattice dynamics simulations

The understanding of the magnetovolume effect lacks explicit consideration of spin-lattice coupling at the atomic level, despite abundant theoretical and experimental studies throughout the years. This research gap is filled by the recently developed spin-lattice dynamics technique implemented in this study, which investigates the magnetovolume effect of isotropic body-centered-cubic (BCC) iron, a topic that has previously been subject to macroscopic analysis only. This approach demonstrates the magnetic anomaly followed by the volumetric changes associated with the effect, each characterized by the corresponding field-induced inflection temperature. The temperature of the heat capacity peaks is useful in determining the temperature for retarding the atomic volume increase. Moreover, this work shows the correlation between the effects of temperature and field strength in determining the equilibrium atomic volume of a ferromagnetic material under a magnetic field.
Authors:
 [1] ;  [2]
  1. Department of Electronic and Information Engineering, the Hong Kong Polytechnic University (Hong Kong)
  2. Department of Physics, the University of Hong Kong (Hong Kong)
Publication Date:
OSTI Identifier:
22299802
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 8; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BCC LATTICES; FERROMAGNETIC MATERIALS; IRON; MAGNETIC FIELDS; SIMULATION; SPECIFIC HEAT; SPIN