Study of the synergistic role of multivalence states of 3d cations on the crystal lattice distortion and magnetic behavior of Sr2FeCoO6-d: A spectroscopic study

被引：4

作者：

Kumari, Divya ^{[1
]}

Singh, Digvijay Narayan ^{[1
,3
]}

Shamim, Md. K. ^{[1
]}

Chowdhury, Sourav ^{[2
,4
]}

Choudhary, R. J. ^{[2
]}

Sharma, Seema ^{[1
]}

机构：

[1] AN Coll, Dept Phys, Mat Res Lab, Patna 800013, Bihar, India

[2] UGC DAE CSR Indore, SVSM PLD Lab, Thin Film Magnetism Grp, Khandwa Rd,Univ Campus, Indore 452001, Madhya Pradesh, India

[3] Indian Inst Sci Bengaluru, Dept Mat Engn, Bengaluru 560012, Karnataka, India

[4] Deutsch Elektronen Synchrotron DESY, P04 Beamline, Petra III, Notkestr 85, D-22607 Hamburg, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 967卷

关键词：

A. Multivalence cations; B. Jahn-Teller distortion; C. X-ray photoelectron spectroscopy; D. X-ray absorption spectroscopy; E. O K -edge; X-RAY-ABSORPTION; ELECTRONIC-STRUCTURE; ELECTRICAL-CONDUCTIVITY; DOUBLE PEROVSKITES; MAGNETORESISTANCE; SUPERSTRUCTURE; TRANSFORMATION; PHOTOEMISSION; TEMPERATURE; SR2FE2O5;

D O I：

10.1016/j.jallcom.2023.171768

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In perovskite oxides, the multiple charge states of cations influence their local structure and correlated physical properties. In this report, we studied the role of multivalence cations on the local structure and magnetic behavior of the oxygen-deficient system Sr2FeCoO6-& delta; (SFCO), prepared by the solid-state synthesis technique. A detailed structural and geometrical analysis confirmed the coexistence of orthorhombic (Brownmillerite) and cubic crystal symmetries and a gesture of the Jahn-Teller (JT) distortion. The intense Raman modes are allowed to be indexed for BO-polyhedra and JT-distortion. Experimental and theoretical analysis of the X-ray photoelectron spectroscopy (XPS) spectra supported the mixed oxidation state of Fe (Fe3+/Fe4+) and Co (Co2+/Co3+), further confirmed by theoretically simulated X-ray absorption spectroscopy (XAS) spectra. The presence of the multivalence states leads to AFM/FM exchange interaction in the sample which further leads to glassy magnetic behavior.

引用

页数：9

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