Morin transition temperature in (0001)-oriented α-Fe2O3 thin film and effect of Ir doping

被引：43
|
作者：
Shimomura, Naoki [1 ]
Pati, Satya Prakash [1 ]
Sato, Yuji [1 ]
Nozaki, Tomohiro [1 ]
Shibata, Tatsuo [2 ]
Mibu, Ko [3 ]
Sahashi, Masashi [1 ]
机构：
[1] Tohoku Univ, Grad Sch Elect Engn, Dept Elect Engn, Sendai, Miyagi 9808579, Japan
[2] TDK Corp, Adv Technol Dev Ctr, Ichikawa 2720026, Japan
[3] Nagoya Inst Technol, Grad Sch Engn, Nagoya, Aichi 4668555, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2015年 / 117卷 / 17期
关键词：
NANOPARTICLES; DEPENDENCE; SYSTEM;
D O I：
10.1063/1.4916304
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The structural properties and Morin transition in c-plane-oriented alpha-Fe2O3 and Ir-doped alpha-Fe2O3 thin films have been investigated. The enhancement of the Morin transition temperature (T-M) in alpha-Fe2O3 film by Ir doping has been demonstrated. The T-M in the c-plane-oriented alpha-Fe2O3 thin film was determined from the temperature-dependent in-plane magnetization and change of coercivity (H-c); this T-M value was found close to that of bulk alpha-Fe2O3. The spin directions of non-doped and Ir-doped alpha-Fe2O3 at room temperature were also estimated from conversion electron Mossbauer spectroscopy measurements. We confirmed that Ir doping dramatically enhances the T-M of alpha-Fe2O3 thin film. (C) 2015 AIP Publishing LLC.
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页数：4
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