Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 500, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2019.166387
Keywords
Double perovskites; Metamagnetic; Magnetocaloric and pyrocurrent effects
Funding
- IIT Kharagpur
- DST
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In this paper, the structural, transport, pyrocurrent and magnetic behaviors of Eu2CoMnO6 (ECMO) sample are reported. It was prepared by the solid-state reaction method and crystallized in monoclinic crystal structure with a space group of P2(1)/n. A systematic study of the temperature and magnetic field-dependent susceptibility revealed a complex magnetic behavior with field-induced type-II metamagnetic phase transition of the first-order. The multiple sharp jumps in the initial magnetization curve for T < 10 K could be attributed to structural distortion related to the martensite-like strains from E*-type antiferromagnetic to ferromagnetic ordering. The metastable magnetic behavior for T >= 60 K is ascribed to a transformation of the low-field disordered spin glass phase to long-range ordered ferromagnetic phase, induced by critical fields. These critical fields are quite sensitive to the direction and magnitude of the field-cooling process. The temperature-dependent magnetocaloric effect with maximum value of similar to 3.3 J kg(-1) K-1 at T-c similar to 123 K and the electrical transport behavior of ECMO were studied. Further, temperature dependent pyroelectric current and polarization data of ECMO are investigated.
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