Effect of particle size on ferroelectric and magnetic properties of BiFeO3 nanopowders

被引：80

作者：

Castillo, M. Escobar ^{[1
,2
,3
,4
]}

Shvartsman, V. V. ^{[1
,2
]}

Gobeljic, D. ^{[1
,2
]}

Gao, Y. ^{[1
,2
]}

Landers, J. ^{[3
,4
]}

Wende, H. ^{[3
,4
]}

Lupascu, D. C. ^{[1
,2
]}

机构：

[1] Univ Duisburg Essen, Inst Mat Sci, D-45141 Essen, Germany

[2] Ctr Nanointegrat Duisburg Essen CENIDE, D-45141 Essen, Germany

[3] Univ Duisburg Essen, Fac Phys, D-47048 Duisburg, Germany

[4] Univ Duisburg Essen, Ctr Nanointegrat Duisburg Essen CENIDE, D-47048 Duisburg, Germany

来源：

NANOTECHNOLOGY | 2013年 / 24卷 / 35期

关键词：

POLARIZATION; PHASE;

D O I：

10.1088/0957-4484/24/35/355701

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The ferroelectric and magnetic behaviour of multiferroic BiFeO3 nanoparticles has been studied using piezoresponse force microscopy (PFM), Mossbauer spectroscopy and SQUID magnetometry. The results of the PFM studies indicate a decay of the spontaneous polarization with decreasing particle size. Nevertheless, particles with diameter similar to 50 nm still manifest ferroelectric behaviour. At the same time these particles are weakly ferromagnetic. The Mossbauer spectroscopy studies prove that the weak ferromagnetic state is due to non-compensated surface spins rather than distortions of the cycloidal spin structure characteristic for bulk BiFeO3.

引用

页数：10

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