TY - JOUR
T1 - Large Coercive Field of 45 kOe in a Magnetic Film Based on Metal-Substituted ϵ-Iron Oxide
AU - Ohkoshi, Shin Ichi
AU - Imoto, Kenta
AU - Namai, Asuka
AU - Anan, Shizuka
AU - Yoshikiyo, Marie
AU - Tokoro, Hiroko
N1 - Funding Information:
The present research was supported in part by a JSPS Grant-in-Aid for Specially Promoted Research (15H05697), “Advanced Research Program for Energy and Environmental Technologies” commissioned by NEDO of METI, JSPS KAKENHI (JP16H06521, “Coordination Asymmetry”), a JSPS Grant-in-Aid for Young Scientists (A), the DOWA Technofund, the Shitagau Noguchi Foundation, and APSA from MEXT. We also recognize the Cryogenic Research Center, The University of Tokyo, and Nanotechnology Platform, which are supported by MEXT.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/9/27
Y1 - 2017/9/27
N2 - Magnetic ferrites are stable, sustainable, and economical. Consequently, they have been used in various fields. The development of large coercive field (large Hc) magnetic ferrites is a very important but challenging issue to accelerate the spread of use and to expand practical applications. In this study, we prepared a rhodium-substituted ϵ-iron oxide film and observed a remarkably large Hc value of 35 kOe at room temperature. This is the largest value among magnetic ferrites to date. Such a large-Hc ferrite is expected to greatly expand the application of magnetic ferrites. Furthermore, when the temperature dependence of the magnetic properties was measured, an even larger Hc value of 45 kOe was recorded at 200 K. Such large Hc values are much larger than those of conventional hard magnetic ferrites.
AB - Magnetic ferrites are stable, sustainable, and economical. Consequently, they have been used in various fields. The development of large coercive field (large Hc) magnetic ferrites is a very important but challenging issue to accelerate the spread of use and to expand practical applications. In this study, we prepared a rhodium-substituted ϵ-iron oxide film and observed a remarkably large Hc value of 35 kOe at room temperature. This is the largest value among magnetic ferrites to date. Such a large-Hc ferrite is expected to greatly expand the application of magnetic ferrites. Furthermore, when the temperature dependence of the magnetic properties was measured, an even larger Hc value of 45 kOe was recorded at 200 K. Such large Hc values are much larger than those of conventional hard magnetic ferrites.
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U2 - 10.1021/jacs.7b07087
DO - 10.1021/jacs.7b07087
M3 - Article
C2 - 28901752
AN - SCOPUS:85030122120
VL - 139
SP - 13268
EP - 13271
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 38
ER -