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

被引：16

作者：

Kotnana, Ganesh ^{[1
]}

Reddy, V. Raghavendra ^{[2
]}

Jammalamadaka, S. Narayana ^{[1
]}

机构：

[1] Indian Inst Technol Hyderabad, Dept Phys, Magnet Mat & Device Phys Lab, Hyderabad 502285, Andhra Pradesh, India

[2] UGC DAE Consortium Sci Res, Khandwa Rd, Indore 452001, Madhya Pradesh, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 429卷

关键词：

Magnetization; Isomer shift; Quadrupole splitting; Ortho-ferrites; Anti-ferromagnetism; MOSSBAUER-SPECTROSCOPY; SUPEREXCHANGE INTERACTION; SPIN REORIENTATION; DIFFRACTION; TRANSITION; FERRITES; BA;

D O I：

10.1016/j.jmmm.2017.01.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on the magnetic and Mossbauer 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 Neel 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.

引用

页码：353 / 358

页数：6

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