Hyun, Sung Wook Kim, Chul Sung Park, Seung-Iel Oh, Young-Jei 2024-01-20T17:34:02Z 2024-01-20T17:34:02Z 2021-09-02 2011-02 0374-4884 https://pubs.kist.re.kr/handle/201004/130671 NiCr(1.9-x)(57)Fe(0.1)In(x)O(4) (x = 0.0, 0.1, 0.3, and 0.5) was prepared by using a sol-gel method. The crystal structure at room temperature was determined to be a normal cubic spinel with space group Fd3m. An analysis of the x-ray diffraction patterns was performed using a Rietveld refinement method while the Bragg R(B) and R(F) factors were below 5%. The magnetic Neel temperature decreased from 150 K to 77 K with increasing In concentration, which was confirmed by zero-field-cooled (ZFC) magnetization at applied fields under 100 Oe and by Mossbauer spectra measured at various temperatures. Magnetic hysteresis loops of the samples at 77 K showed drastically increasing magnetization and decreasing coercivity with increasing In concentration. The Mossbauer spectra of the samples were measured at various temperatures ranging from 4.2 to 295 K. The isomer shift value showed that the charge states of the iron ions are ferric. The Mossbauer spectra showed two magnetic phases with two different magnetic spin direction sites for the Cr(3+) ion state. Mossbauer spectra below 77 K showed 6 sharp absorption lines and the linewidth became broader with increasing temperature, which indicates a Jahn-Teller distortion and relaxation. English KOREAN PHYSICAL SOC SPINEL TRANSITION Study on the Magnetic Behavior of In-doped Nickel Chromite by Using Mossbauer Spectroscopy Article 10.3938/jkps.58.297 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.58, no.2, pp.297 - 300 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 58 2 297 300 scie scopus kci ART001526094 000287426100022 2-s2.0-79951607956 Physics, Multidisciplinary Physics Article SPINEL TRANSITION Mossbauer Chromite Relaxation effect