Direct visualization of magnetic-field-induced magnetoelectric switching in multiferroic aurivillius phase thin films

被引：36

作者：

Faraz, Ahmad ^{[1
]}

Maity, Tuhin ^{[1
]}

Schmidt, Michael ^{[1
]}

Deepak, Nitin ^{[1
]}

Roy, Saibal ^{[1
]}

Pemble, Martyn E. ^{[1
,2
]}

Whatmore, Roger W. ^{[2
,3
]}

Keeney, Lynette ^{[1
]}

机构：

[1] Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland

[2] Univ Coll Cork, Dept Chem, Cork, Ireland

[3] Imperial Coll London, Dept Mat, Fac Engn, London, England

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2017年 / 100卷 / 03期

基金：

爱尔兰科学基金会;

关键词：

ferroelectricity/ferroelectric materials; ferromagnetism/ferromagnetic materials; magnetoelectrics; multiferroics; thin films; ROOM-TEMPERATURE; EPITAXIAL-FILMS; EXCHANGE BIAS; ELECTROMECHANICS; FERROMAGNETISM; POLARIZATION; ENHANCEMENT; BIFEO3; OXIDES;

D O I：

10.1111/jace.14597

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Multiferroic materials displaying coupled ferroelectric and ferromagnetic order parameters could provide a means for data storage whereby bits could be written electrically and read magnetically, or vice versa. Thin films of Aurivillius phase Bi6Ti2.8Fe1.52Mn0.68O18, previously prepared by a chemical solution deposition (CSD) technique, are multiferroics demonstrating magnetoelectric coupling at room temperature. Here, we demonstrate the growth of a similar composition, Bi6Ti2.99Fe1.46Mn0.55O18, via the liquid injection chemical vapor deposition technique. High-resolution magnetic measurements reveal a considerably higher in-plane ferromagnetic signature than CSD grown films (M-S=24.25emu/g (215emu/cm(3)), M-R=9.916emu/g (81.5emu/cm(3)), H-C=170Oe). A statistical analysis of the results from a thorough microstructural examination of the samples, allows us to conclude that the ferromagnetic signature can be attributed to the Aurivillius phase, with a confidence level of 99.95%. In addition, we report the direct piezoresponse force microscopy visualization of ferroelectric switching while going through a full in-plane magnetic field cycle, where increased volumes (8.6% to 14% compared with 4% to 7% for the CSD-grown films) of the film engage in magnetoelectric coupling and demonstrate both irreversible and reversible magnetoelectric domain switching.

引用

页码：975 / 987

页数：13

共 35 条

[1] Potentially multiferroic Aurivillius phase Bi5FeTi3O15: Cation site preference, electric polarization, and magnetic coupling from first principles [J].