Observation of magnetization reversal and magnetocaloric effect in manganese modified EuCrO3 orthochromites
authors Kumar, S; Coondoo, I; Vasundhara, M; Puli, VS; Panwar, N
nationality International
journal PHYSICA B-CONDENSED MATTER
author keywords Chromites; Magnetization reversal; Spin reorientation; Magneto-caloric effect
keywords WEAK-FERROMAGNETISM; SUPEREXCHANGE INTERACTION; EXCHANGE BIAS; TEMPERATURE; PEROVSKITES; TRANSITIONS; CHEMISTRY; CHROMITES; SYSTEM
abstract We report here an investigation on the structural, magnetic and magnetocaloric properties of Mn doped EuCr0.85Mn0.15O3 (ECMO) chromites synthesized via ceramic route. The compound crystallized into distorted orthorhombic structure with Pnma space group similar to that of its parent EuCrO3 compound, as revealed from the refined of x-ray powder diffraction pattern, but with an increase in the lattice volume. Neel temperature, noticed at 162 K from the temperature variation of magnetization, smaller than that reported for pristine EuCrO3; indicated the influence of Mn3+ substitution in decreasing the antiferromagnetic ordering. Magnetization reversal evolved in the studied compound under lower field while such feature was absent in the undoped EuCrO3. Magnetocaloric effect was measured through the magnetic entropy change and relative cooling power. Near the spin reorientation transition temperature similar to 40 K, the magnetic entropy change was equal to 3.788 J kg(-1) K-1 under 90 kOe field with 215.22 J kg(-1)relative cooling power. The results have been understood in terms of the competition between Cr-rich clusters, Mn-rich clusters and local Mn-Cr ordered clusters and their different temperature dependency.
publisher ELSEVIER SCIENCE BV
issn 0921-4526
isbn 1873-2135
year published 2017
volume 519
beginning page 69
ending page 75
digital object identifier (doi) 10.1016/j.physb.2017.05.050
web of science category Physics, Condensed Matter
subject category Physics
unique article identifier WOS:000405266000009
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journal impact factor 1.453
5 year journal impact factor 1.374
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