Enhanced spin – reorientation temperature and origin of magnetocapacitance in HoFeO3

Kotnana, G and J, Suryanarayana (2016) Enhanced spin – reorientation temperature and origin of magnetocapacitance in HoFeO3. Journal of Magnetism and Magnetic Materials, 418. pp. 81-85. ISSN 0304-8853

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We report on the increase in the spin reorientation temperature in HoFe0.5Cr0.5O3 compound by isovalent substitution (Cr3+) at the Fe-site and the magnetocapacitance in the HoFeO3 compound. Spin reorientation transition is evident around 50 K and 150 K for the x=0 and x=0.5 compounds respectively. The increase in the spin reorientation transition temperature in case of x=0.5 compound can be attributed to the domination of the Ho3+- Fe3+ interaction over the Fe3+- Fe3+ interaction. Decrease in Néel temperature from 643 K (x=0) to 273 K (x=0.5) can be ascribed to the decrease in the interaction between antiferromagnetically aligned Fe3+ moments as a result of the dilution of the Fe3+ moments with the Cr3+ addition. From the magnetization M vs. magnetic field H variation it is evident that the coercivity, HC decreases for x=0.5 compound, hinting the magnetic softening of the HoFeO3 compound. Observed magnetocapacitance could be due to lossy dielectric mechanism in the present compound. Indeed, present results would be helpful in understanding the physics behind rare- earth orthoferrites.

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IITH Creators:
IITH CreatorsORCiD
J, SuryanarayanaUNSPECIFIED
Item Type: Article
Additional Information: We would like to acknowledge Indian Institute of Technology, Hyderabad for the Financial support.
Uncontrolled Keywords: Spin reorientation; Orthoferrites; Magnetocapacitance; Magnetostriction; Antiferromagnetism
Subjects: Physics > Magnetism
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 23 Feb 2016 06:50
Last Modified: 12 Sep 2017 06:47
URI: http://raiith.iith.ac.in/id/eprint/2199
Publisher URL: https://doi.org/10.1016/j.jmmm.2016.02.054
OA policy: http://www.sherpa.ac.uk/romeo/issn/0304-8853/
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