Magnetic and hyperfine interactions in HoFe1−xCrxO3 (0≤x≤1) compounds

Kotnana, G and Reddy, V R and J, Suryanarayana (2017) Magnetic and hyperfine interactions in HoFe1−xCrxO3 (0≤x≤1) compounds. Journal of Magnetism and Magnetic Materials, 429. pp. 353-358. ISSN 0304-8853

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We report on the magnetic and Mössbauer properties of polycrystalline HoFe1-xCrxO3 (0≤x≤1) compounds. Magnetization data reveals the continuous tailoring of magnetic transition due to weakening of Ho3+-Fe3+ and Fe3+-Fe3+ interactions in the entire temperature range by replacing the Fe3+ ions with Cr3+ ions. The observed decrease in Néel temperature (TN) and increase in spin re-orientation transition temperature (TSR) with the replacement of Fe3+ with Cr3+ is ascribed to the weakening of Fe(Cr)-O-Fe(Cr) antiferromagnetic exchange interaction. In addition, we also attribute such a change in TN to the enhancement of ferromagnetic interaction of adjacent Cr3+ moments through t-e hybridization as a result of the structural distortion. The decrease in isomer shift (IS) suggests enhancement of the interaction between nuclear charge with the 3s electrons as a result of decrease in radial part of 3d wave function with Cr addition. In this paper we also discuss about the variation of quadrupole splitting (QS) and hyperfine fields (Hhf) with Cr addition in HoFe1-xCrxO3 (0≤x≤1) compounds.

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IITH Creators:
IITH CreatorsORCiD
J, SuryanarayanaUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Magnetization; Isomer shift; Quadrupole splitting; Ortho-ferrites; Anti-ferromagnetism
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 13 Feb 2017 07:21
Last Modified: 12 Sep 2017 06:46
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