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Title: Mössbauer spectra of CoZn-substituted Z-type barium ferrite Ba3Co2-xZnxFe24O41
Authors: Li, Z.W. 
Guoqing, L. 
Di, N.-L.
Cheng, Z.-H.
Ong, C.K. 
Issue Date: 1-Sep-2005
Citation: Li, Z.W., Guoqing, L., Di, N.-L., Cheng, Z.-H., Ong, C.K. (2005-09-01). Mössbauer spectra of CoZn-substituted Z-type barium ferrite Ba3Co2-xZnxFe24O41. Physical Review B - Condensed Matter and Materials Physics 72 (10) : -. ScholarBank@NUS Repository.
Abstract: Mössbauer spectra of powder and aligned Ba3Co2-xZnxFe24O41 samples with x=0-2.0 have been obtained and analyzed at room temperature and at T=7K with applied magnetic fields of 0 and 60kOe. The relationship between Mössbauer parameters and magnetic properties has been studied. The magnetocrystalline anisotropy of Ba3Co2-xZnxFe24O41 is modified from the c plane to the c axis at Zn concentration x=1.2-1.6, based on the dependence of the quadrupole splitting and hyperfine field on Zn substitution for powder samples, and the values of the angle factor b for aligned samples. Zn ions occupy only sites with down spin, while Co ions prefer sites with up spin. As the Zn substitution increases, the increase in saturation magnetization is attributed to the occupation of Zn ions at sites with down spin, which decreases the negative magnetization, thus increasing the net magnetization. © 2005 The American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
ISSN: 10980121
DOI: 10.1103/PhysRevB.72.104420
Appears in Collections:Staff Publications

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