TY - JOUR
T1 - Temperature dependence of site-resolved Fe magnetic moments in ThMn12-type Sm(Fe1−xCox)12 compounds studied via synchrotron Mössbauer spectroscopy
AU - Ogawa, D.
AU - Fukazawa, T.
AU - Li, S.
AU - Ueno, T.
AU - Sakai, S.
AU - Mitsui, T.
AU - Miyake, T.
AU - Okamoto, S.
AU - Hirosawa, S.
AU - Takahashi, Y. K.
N1 - Funding Information:
The authors thank Dr. Y. Toga for fruitful discussion in the exchange coupling culculation. This study was supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, as a part of the Elements Strategy Initiative Center for Magnetic Materials (ESICMM) (Grant No. JPMXP0112101004 ) and QST Advanced Characterization Nanotechnology Platform under the remit of “Nanotechnology Platform” (Grant Nos. JPMXP09A18QS0002 , JPMXP09A18QS0022 , JPMXP09A19QS0002 ). The synchrotron radiation experiments were performed using a QST experimental station at the QST beamline BL11XU, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2018A3582 , 2018B3582 , 2019A3582 , and 2019B3582 ).
Funding Information:
The authors thank Dr. Y. Toga for fruitful discussion in the exchange coupling culculation. This study was supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan, as a part of the Elements Strategy Initiative Center for Magnetic Materials (ESICMM) (Grant No. JPMXP0112101004) and QST Advanced Characterization Nanotechnology Platform under the remit of “Nanotechnology Platform” (Grant Nos. JPMXP09A18QS0002, JPMXP09A18QS0022, JPMXP09A19QS0002). The synchrotron radiation experiments were performed using a QST experimental station at the QST beamline BL11XU, SPring-8, with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2018A3582, 2018B3582, 2019A3582, and 2019B3582).
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - The relationship between the magnetization and magnetic moment at each Fe site in Sm(Fe1−xCox)12 compounds and their temperature dependence were investigated via synchrotron Mössbauer spectroscopy. The enhancement in the Fe magnetic moments in the Sm(Fe1−xCox)12 compounds with increasing Co content was observed at a similar rate as the increment in their saturation magnetization at 300 K. We found that the magnitudes of the Fe magnetic moments vary in a descending order: 8i > 8j > 8f, and they are independent of the Co content because the variation is caused by the magneto-volume effect. The curvatures of the temperature dependence of the Fe-sublattice magnetic moments are larger and also vary in the order of 8i > 8j > 8f because the enhancements in the exchange coupling strength decrease in the same order.
AB - The relationship between the magnetization and magnetic moment at each Fe site in Sm(Fe1−xCox)12 compounds and their temperature dependence were investigated via synchrotron Mössbauer spectroscopy. The enhancement in the Fe magnetic moments in the Sm(Fe1−xCox)12 compounds with increasing Co content was observed at a similar rate as the increment in their saturation magnetization at 300 K. We found that the magnitudes of the Fe magnetic moments vary in a descending order: 8i > 8j > 8f, and they are independent of the Co content because the variation is caused by the magneto-volume effect. The curvatures of the temperature dependence of the Fe-sublattice magnetic moments are larger and also vary in the order of 8i > 8j > 8f because the enhancements in the exchange coupling strength decrease in the same order.
KW - Magnetic moment of Fe
KW - Sm(Fe-Co) compound
KW - Synchrotron Mössbauer spectroscopy
KW - Temperature dependence
UR - http://www.scopus.com/inward/record.url?scp=85124938709&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85124938709&partnerID=8YFLogxK
U2 - 10.1016/j.jmmm.2022.169188
DO - 10.1016/j.jmmm.2022.169188
M3 - Article
AN - SCOPUS:85124938709
SN - 0304-8853
VL - 552
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 169188
ER -