Phase Formation and Exchange Bias in LuFeO3-Co x Fe3-x O4 Nanocomposite Films

被引：0
|
作者：
Cho, Eunsoo [1 ]
Penn, Aubrey N. [2 ]
Ross, Caroline A. [1 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[2] MIT, MITnano, Cambridge, MA 02139 USA
来源：
ACS APPLIED ELECTRONIC MATERIALS | 2024年 / 6卷 / 05期
基金：
美国国家科学基金会;
关键词：
self-assembled nanocomposite; complex oxides; thin film growth; pulsed laserdeposition; magneticexchange coupling; ferroelectricity; THIN-FILMS; GROWTH;
D O I：
10.1021/acsaelm.4c00339
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Vertically aligned nanocomposite thin films comprising antiferromagnetic and ferroelectric LuFeO3 and ferrimagnetic CoxFe3-xO4 are synthesized by a codeposition method using pulsed laser deposition from two or three targets of different composition. The phases that form (perovskite, spinel, and rocksalt), their compositions, and the magnetic anisotropy of the nanocomposites are strongly influenced by the selection of targets from the group of Lu-rich LuFeO3, Fe-rich LuFeO3, CoFe2O4, and Co3O4. When the Co and Fe are delivered from different targets, the spinel crystals have a range of compositions. Owing to the crystallographic relationship between the perovskite LuFeO3 and spinel CoxFe3-xO4 in the nanocomposites, a negative exchange bias of -5.3 mT at room temperature is demonstrated upon field cooling a 31 nm thick LuFeO3-Co1.2Fe1.8O4 film
引用
收藏
页码：3638 / 3646
页数：9
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