溅射法制备的（001）BiFeO3 薄膜，具有铁磁 L10-FePt（001）电极，基片为玻璃。

Sputter-prepared (001) BiFeO3 thin films with ferromagnetic L10-FePt(001) electrode on glass substrates.

机构信息

Department of Physics, Tunghai University, Taichung, 407, Taiwan.

出版信息

Nanoscale Res Lett. 2012 Aug 3;7(1):435. doi: 10.1186/1556-276X-7-435.

DOI:10.1186/1556-276X-7-435

PMID:22863085

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC3477037/

Abstract

Highly textured BiFeO3(001) films were formed on L10-FePt(001) bottom electrodes on glass substrates by sputtering at reduced temperature of 400°C. Good electric polarization 2Pr = 80 and 95 μC/cm2, comparable to that of the reported epitaxial films, and coercivity Ec = 415 and 435 kV/cm are achieved in the samples with 20-nm- and 30-nm-thick electrodes. The BiFeO3(001) films show different degrees of compressive strain. The relation between the variations of strain and 2Pr suggests that the enhancement of 2Pr resulted from the strain-induced rotation of spontaneous polarization. The presented results open possibilities for the applications based on electric-magnetic interactions.

摘要

高织构 BiFeO3(001) 薄膜在玻璃衬底上通过低温（400°C）溅射在 L10-FePt(001) 底电极上形成。在厚度为 20nm 和 30nm 的电极的样品中，实现了 2Pr=80 和 95μC/cm2 的良好电极化，与报道的外延薄膜相当，矫顽力 Ec=415 和 435kV/cm。BiFeO3(001) 薄膜表现出不同程度的压缩应变。应变变化与 2Pr 的关系表明，2Pr 的增强是由于自发极化的应变诱导旋转引起的。所呈现的结果为基于电磁相互作用的应用开辟了可能性。