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 th...

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Bibliographic Details
Published in:AIP advances 2014-08, Vol.4 (8), p.087123-087123-10
Main Authors: Chui, C. P., Zhou, Yan
Format: Article
Language:English
Subjects:
BCC LATTICES
Body centered cubic lattice
FERROMAGNETIC MATERIALS
Field strength
IRON
Magnetic anomalies
MAGNETIC FIELDS
MATERIALS SCIENCE
SIMULATION
SPECIFIC HEAT
SPIN
Spin dynamics
Temperature effects
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Summary: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.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4893469