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.

引用

页数：6

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