TY - JOUR
T1 - Experimental confirmation of grain boundary magnetism in FeSi and FeSn alloys by TEM-EELS
AU - Ii, Seiichiro
AU - Hirayama, Kyosuke
AU - Tsurekawa, Sadahiro
N1 - Funding Information:
The authors express their sincere thanks to Prof. R. Tomoshige in Sojo University for his kind agreement of use of TEM-EELS, and to Profs M. Šob in Masaryk University and Y. Morizono in Kumamoto University (now at National Institute of Technology, Kurume College) for their fruitful discussion and encouragement. We also thank Dr. T. Yamamuro and Mr. H. Matsumoto in Kumamoto University for the development of the software for the calculation of the intensity of the L2 and L3 edges in EELS spectra. This study was supported by Grant-in-Aid for Scientific Research (S) (19106013 and 16H06366) and Grant-in-Aid for Scientific Research (A) (24246125) from the Japan Society for the Promotion of Science (JSPS), Japan.
Funding Information:
The authors express their sincere thanks to Prof. R. Tomoshige in Sojo University for his kind agreement of use of TEM-EELS, and to Profs M. Šob in Masaryk University and Y. Morizono in Kumamoto University (now at National Institute of Technology, Kurume College) for their fruitful discussion and encouragement. We also thank Dr. T. Yamamuro and Mr. H. Matsumoto in Kumamoto University for the development of the software for the calculation of the intensity of the L2and L3 edges in EELS spectra. This study was supported by Grant-in-Aid for Scientific Research (S) (19106013 and 16H06366) and Grant-in-Aid for Scientific Research (A) (24246125) from the Japan Society for the Promotion of Science (JSPS), Japan.
Publisher Copyright:
©2019 The Japan Institute of Metals and Materials.
PY - 2019
Y1 - 2019
N2 - We measured the local magnetic moments at grain boundaries in FeSi and FeSn alloys by electron energy loss spectroscopy with a transmission electron microscope and evaluated the relation between the grain boundary magnetism and grain boundary segregation in FeSi and FeSn alloys. We found that the local magnetic moments at the random boundaries in these alloys were remarkably reduced in comparison with those in pure Fe, whereas there was no considerable change at the 5 grain boundary and low-angle boundary. The variation of the local magnetic moments at impurity-segregated grain boundaries was explained by the competition between magnetovolume effect and hybridizations of electrons. It was found that the grain boundary character remarkably affects this hybridization. The decrease in the magnetic moments at random grain boundaries was more pronounced in the FeSn alloy than in the FeSi alloy.
AB - We measured the local magnetic moments at grain boundaries in FeSi and FeSn alloys by electron energy loss spectroscopy with a transmission electron microscope and evaluated the relation between the grain boundary magnetism and grain boundary segregation in FeSi and FeSn alloys. We found that the local magnetic moments at the random boundaries in these alloys were remarkably reduced in comparison with those in pure Fe, whereas there was no considerable change at the 5 grain boundary and low-angle boundary. The variation of the local magnetic moments at impurity-segregated grain boundaries was explained by the competition between magnetovolume effect and hybridizations of electrons. It was found that the grain boundary character remarkably affects this hybridization. The decrease in the magnetic moments at random grain boundaries was more pronounced in the FeSn alloy than in the FeSi alloy.
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U2 - 10.2320/matertrans.MB201803
DO - 10.2320/matertrans.MB201803
M3 - Article
AN - SCOPUS:85065242369
SN - 0916-1821
VL - 60
SP - 636
EP - 641
JO - Materials Transactions
JF - Materials Transactions
IS - 5
ER -