TY - JOUR
T1 - Change of longitudinal spin Seebeck voltage with annealing in Y3Fe5O12 films formed by densely packed nanocrystals
AU - Yamada, Keisuke
AU - Masaki, Shinya
AU - Yamamoto, Mikiya
AU - Kondo, Keita
AU - Kurokawa, Yuichiro
AU - Shiota, Yoichi
AU - Moriyama, Takahiro
AU - Ono, Teruo
AU - Yuasa, Hiromi
AU - Shima, Mutsuhiro
N1 - Funding Information:
We thank to Prof. S. Iwata, Prof. T. Kato, Prof. D. Oshima, and Dr. M. Kumazawa for the measuring sample thickness by a profilometry at Nagoya University, Japan, and to K. Kogiso and Dr. K. Hayashi for collaboration on the early stages of this work. This study was supported in part by a JSPS KAKENHI Grant No. 20K05255 , by the Collaborative Research Program of Institute for Chemical Research, Kyoto University (grants # 2020-95 and # 2021-96 ), by the joint usage/research program of the Institute of Materials and Systems for Sustainability (IMaSS) and by Nanotechnology Platform Program of the Ministry of Education, Culture, Sports, Science and Technology ( MEXT, Japan ) (grants # JPMXP09- F20-NU-0025 and JPMXP09- F21-NU-0009 ), Nagoya University, and Koshiyama Science and Technology Foundation, Research Foundation for the Electrotechnology of Chubu (R-02227), and Paloma Environmental Technology Development Foundation (2021AY). A part of this work was supported by Division of Instrumental Analysis, Life Science Research Center, Gifu University.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - The changes of longitudinal spin Seebeck (LSSE) voltage with annealing temperature Ta and time in Y3Fe5O12 (YIG) films formed by densely packed nanocrystals on a Si substrate have been investigate. The value of thermoelectric performance (TP) decreases monotonically with increasing Ta from 1073 K to 1273 K, and it decreases by up to 24% (64%) in the YIG films with Pt = 5 nm (10 nm). The decreased TP is also observed with increasing annealing time. These results indicate that the microstructural changes in the YIG films by annealing temperature and time are caused the decreased TP, which are corresponded with a reduced coherence of the magnons in the YIG films.
AB - The changes of longitudinal spin Seebeck (LSSE) voltage with annealing temperature Ta and time in Y3Fe5O12 (YIG) films formed by densely packed nanocrystals on a Si substrate have been investigate. The value of thermoelectric performance (TP) decreases monotonically with increasing Ta from 1073 K to 1273 K, and it decreases by up to 24% (64%) in the YIG films with Pt = 5 nm (10 nm). The decreased TP is also observed with increasing annealing time. These results indicate that the microstructural changes in the YIG films by annealing temperature and time are caused the decreased TP, which are corresponded with a reduced coherence of the magnons in the YIG films.
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U2 - 10.1016/j.jmmm.2021.168093
DO - 10.1016/j.jmmm.2021.168093
M3 - Article
AN - SCOPUS:85107682615
SN - 0304-8853
VL - 535
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
M1 - 168093
ER -