57Fe Mossbauer study of CoCrxFe2-xO4 nano ferrite

被引：4
|
作者：
Tiwari, P. [1 ]
Verma, R. [1 ]
Modak, S. S. [2 ]
Reddy, V. R. [3 ]
Mazaleyrat, F. [4 ]
Kane, S. N. [1 ]
机构：
[1] DA Univ, Sch Phys, Magnet Mat Lab, Khandwa Rd, Indore 452001, India
[2] Jaypee Univ Engn & Technol, Phys Dept, Raghogarh 473226, Guna, India
[3] UGC DAE Consortium Sci Res, Khandwa Rd, Indore 452001, India
[4] ENS Paris Saclay, SATIE, 4 Ave Sci, F-91190 Gif Sur Yvette, France
来源：
HYPERFINE INTERACTIONS | 2021年 / 242卷 / 01期
关键词：
Spinel ferrites; XRD; Cationic distribution; Magnetic properties; Mossbauer spectroscopy; MAGNETIC-PROPERTIES; NANOPARTICLES; DISTRIBUTIONS; SUBSTITUTION; SIZE;
D O I：
10.1007/s10751-021-01781-z
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
We report sol gel auto-combustion synthesized CoCrxFe2-xO4 (x = 0.0 - 1.0) spinel ferrites, and use x-ray diffraction 'XRD', magnetic measurements, and Mossbauer spectroscopy to study the effect of Cr-content on their structural properties, magnetic properties, and correlation between them. Formation of single-phase nono spinel ferrite (grain size: 18.1 - 46.6 nm), is confirmed by XRD. Results show that with increasing Cr-content, lattice parameter decreases, and Cr3+ ions remain more populated on B-site, whereas Co2+ ions remains almost equally populated on both A, B site, show lower disorder, and modification of A-O - A, B- O - B, A-O - B super-exchange interaction. For Cr-content >= 0.75, Mossbauer measurements show presence of a non-magnetic doublet, and isomer shift values confirm that Fe has 3 + oxidation state. Observed structural changes, lead to reduction of saturation magnetization, coercivity.
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页数：15
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