Spin polarization measurements in ferromagnetic SrRuO3 using point-contact Andreev reflection technique

被引：4
|
作者：
Shiga, Masanobu [1 ]
Nishimura, Naoto [1 ]
Inagaki, Yuji [1 ]
Kawae, Tatsuya [1 ]
Kambara, Hiroshi [2 ]
Tenya, Kenichi [2 ]
机构：
[1] Kyushu Univ, Fac Engn, Dept Appl Quantum Phys, Fukuoka, Fukuoka 8128581, Japan
[2] Shinshu Univ, Fac Educ, Nagano 3808544, Japan
来源：
INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2016) | 2017年 / 807卷
基金：
日本学术振兴会;
关键词：
D O I：
10.1088/1742-6596/807/8/082001
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Using the point-contact Andreev reflection (PCAR) technique, we have performed spin polarization measurements in a polycrystalline SrRuO3 to study the difference of the spin polarization between the ballistic and diffusive transport samples. PCAR spectra were measured with Nb tips for T = 4.2 K with changing the contact area mechanically. The results were well fitted by the modified Blonder-Tinkham-Klapwijk (mBTK) model. We estimate the spin polarization P approximate to 0.59, which is slightly larger than that of a single crystal film with P approximate to 0.51 due to the change of transport property.
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页数：6
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