Flexomagnetic effect in frustrated triangular magnetic structures

Pavel Lukashev, Renat F. Sabirianov

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

We report appearance of the net magnetization in Mn-based antiperovskite compounds as a result of the external strain gradient (flexomagnetic effect). In particular, we describe the mechanism of the magnetization induction in the Mn3GaN at the atomic level in terms of the behavior of the local magnetic moments of the Mn atoms. We show that the flexomagnetic effect is linear and results from the nonuniformity of the strain, i.e., it is absent not only in the ground state but also when the applied external strain is uniform. We estimate the flexomagnetic coefficient to be ∼2 μB Å. We show that at the moderate values of the strain gradient (∼0.1%) the flexomagnetic contribution to the net induced magnetization is comparable with the nonlinear contribution. Finally, we apply a classical Heisenberg model to study the correlation between spin-exchange interaction and flexomagnetism, using time quantified Monte Carlo simulation. This confirms the linear nature of the flexomagnetic effect and helps understanding phenomenological aspects behind it.

Original languageEnglish (US)
Article number094417
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number9
DOIs
StatePublished - Sep 10 2010

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Magnetic structure
Magnetization
magnetization
gradients
spin exchange
nonuniformity
Exchange interactions
induction
magnetic moments
Magnetic moments
Ground state
ground state
coefficients
estimates
Atoms
atoms
simulation
interactions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Flexomagnetic effect in frustrated triangular magnetic structures. / Lukashev, Pavel; Sabirianov, Renat F.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 82, No. 9, 094417, 10.09.2010.

Research output: Contribution to journalArticle

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