caa a22 4500 445381663 CHVBK 20180317143019.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1033-0 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1033-0 Spin-Reorientation and Mössbauer Study of Orthoferrite TbFe0.75Mn0.25O3 [Elektronische Daten] [Woochul Kim, Bok Kum, Chul Kim] The crystallographic and magnetic properties of TbFe0.75Mn0.25O3 powder were characterized by x-ray diffraction (XRD), Mössbauer spectroscopy, and vibrating-sample magnetometry (VSM). The crystal structure was found to be orthorhombic (space group Pbnm) with lattice constants a 0=5.317Å, b 0=5.604Å, and c 0=7.598Å, respectively. Mössbauer spectra of TbFe0.75Mn0.25O3 have been taken at various temperatures ranging from 4.2 to 550K. For Mössbauer spectra, we have fitted the spectra to a model based on a random distribution of Fe and Mn ions on the octahedral sites. The magnetic hyperfine fields of the four pattern (B 0,B 1,B 2,B 3) at 4.2K are found to be H hf=553, 544, 535, and 527kOe, respectively. Isomer shift at room temperature is 0.25-0.26mm/s, which means that the valence state of Fe ions is ferric (Fe3+). Asudden change in both the magnitude of magnetic hyperfine field and its slope between 150 and 220K suggests that magnetic phase transition related to the spin ordering takes place abruptly. The Néel temperature was determined to be T N=550±5K. The inflection points arising from a spin reorientation in the temperature dependence of the magnetic moment is observed. Its spin-reorientation transition is 70K lower than that of 250K for pure TbFeO3. Springer Science+Business Media, LLC, 2010 Mössbauer spectroscopy nationallicence Orthoferrite nationallicence Sol-gel nationallicence Kim Woochul Department of Physics, Kookmin University, 136-702, Seoul, Korea aut Kum Bok Department of Physics, Kookmin University, 136-702, Seoul, Korea aut Kim Chul Department of Physics, Kookmin University, 136-702, Seoul, Korea aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 867-870 1557-1939 24:1-2<867 2011 24 10948 https://doi.org/10.1007/s10948-010-1033-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1033-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kim Woochul Department of Physics, Kookmin University, 136-702, Seoul, Korea aut NATIONALLICENCE 700 1- Kum Bok Department of Physics, Kookmin University, 136-702, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Chul Department of Physics, Kookmin University, 136-702, Seoul, Korea aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 867-870 1557-1939 24:1-2<867 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer