Enhanced magnetocaloric effect due to selective dilution in a triangular Ising antiferromagnet

Abstract

We employ an effective-field theory with correlations in order to study a magnetocaloric effect on a triangular Ising antiferromagnet, which is selectively diluted by non-magnetic impurities on one of the three sublattices. Such a dilution generally relieves massive degeneracy in our system and therefore the ground-state entropy diminishes and the magnetocaloric effect weakens at low temperatures. However, at relatively higher temperatures we can observe significantly enhanced negative isothermal entropy changes for the sublattice concentration $p_{\mathrm{A}}=0.8$.

3 pages, 5 figures, CSMAG'16 conference

References in corpus (2)

• Enhanced magnetocaloric effect in frustrated magnets
• Critical and tricritical behavior of a selectively diluted triangular Ising antiferromagnet in a field