Contribution of Langevin behavior to the low temperature maximum in zero-field cooled magnetization of the discontinuous Fe films

Shiratsuchi, Yu; Nakatani, Ryoichi; Yamamoto, Masahiko

Journal of Applied Physics, 2008, 103(7), 07B503

Number of Access:746（2025-08-14 04:34 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/89983

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Title
Contribution of Langevin behavior to the low temperature maximum in zero-field cooled magnetization of the discontinuous Fe films
Creator
NRID
1000070379121 1000070379121
ORCID
0000-0002-8938-4869 0000-0002-8938-4869
researchmap permalink
read0090304 read0090304
Scopus Author ID
6602197167 6602197167
CreatorName
Shiratsuchi, Yu
NRID
1000060314374 1000060314374
researchmap permalink
read0068619 read0068619
Scopus Author ID
7005234924 7005234924
CreatorName
Nakatani, Ryoichi
NRID
1000030029160 1000030029160
CreatorName
Yamamoto, Masahiko
Description
Yu Shiratsuchi, Ryoichi Nakatani, and Masahiko Yamamoto, Journal of Applied Physics 103, 07B503 (2008); https://doi.org/10.1063/1.2830948.
Abstract
The dominant factor of low temperature maximum of zero-field cooled (ZFC) magnetization has been investigated using a discontinuous ultrathin Fe film which is superparamagnetic at room temperature. The peak temperature of ZFC magnetization increases with increasing magnetic field strength, contrary to the Ǹel-Brown model. It is explained by the Langevin behavior of superparamagnetic particles dominating the low temperature maximum of ZFC magnetization due to the wide energy barrier distribution. For the case, the peak temperature should not be a good estimation of the blocking temperature since thermal activation of magnetization does not have a significant role in the low temperature maximum of ZFC magnetization.
Publisher
American Institute of Physics
Source Title
Journal of Applied Physics
Volume (Issue)
103(7)
Page
07B503
Date of Issued
2008-01-24
Language
English
Handle URL
https://hdl.handle.net/11094/89983
PISSN
00218979
NCID
AA00693547
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1063/1.2830948
Access Rights
open access
CopyRight
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Yu Shiratsuchi, Ryoichi Nakatani, and Masahiko Yamamoto, Journal of Applied Physics 103, 07B503 (2008) and may be found at https://doi.org/10.1063/1.2830948.
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Category
学術雑誌論文 Journal Article