Dynamic critical temperature in MnIIFeIII bimetallic oxalates

• Published in: Physica A Vol. 479; pp. 460 - 466
• Main Authors: Huang, Jinhua, Shi, Xiaoling, Song, Zhaoyuan, Shi, Yingguo
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2017
• Subjects: A spin-5/2 Blume–Capel model; Dynamic critical temperature; Effective-field theory; MnIIFeIII bimetallic oxalates; A spin-5/2 Blume–Capel model; Dynamic critical temperature; Effective-field theory; MnIIFeIII bimetallic oxalates
• ISSN: 0378-4371; 1873-2119
• DOI: 10.1016/j.physa.2017.03.020

•MnIIFeIII bimetallic oxalates is studied by the effective-field theory.•The dynamic phase boundaries in DA∕|J1|–T∕|J1| and T∕|J1|–h0∕|J1| planes are obtained.•The compounds show uncompensated magnetization in antiferromagnetic phase.•The system exhibits a two-compensation-temperature phenomenon. MnIIFeIII bimetallic oxalates are described by a spin-5/2 Blume–Capel (BC) model on a layered honeycomb structure. The effects of the interlayer coupling, the single-ion anisotropy and the oscillating magnetic field on the dynamic critical temperature of the compounds are studied by a effective-field method based on Glauber-type stochastic dynamic. Dynamic phase diagrams are presented in the DA∕J1–T∕J1 and T∕J1–h0∕J1 planes, and the first-order phase transition lines and the critical end point are found. Compensated magnetization regions have also been plotted and the compounds exhibit an uncompensated magnetization in the antiferromagnetic phase. In particular, a two-compensation-temperature phenomenon has also been observed in MnIIFeIII bimetallic oxalates.