High temperature neutron diffraction studies of 0.9BiFeO3-0.1PbTiO3

被引：30

作者：

Comyn, Tim P. ^{[1
]}

Stevenson, Tim ^{[1
]}

Al-Jawad, Maisoon ^{[2
]}

Turner, Stuart L. ^{[1
]}

Smith, Ronald I. ^{[3
]}

Bell, Andrew J. ^{[1
]}

Cywinski, Robert ^{[4
]}

机构：

[1] Univ Leeds, Inst Mat Res, Leeds LS2 9JT, W Yorkshire, England

[2] Univ Leeds, Leeds Dent Inst, Leeds LS2 9LU, W Yorkshire, England

[3] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[4] Univ Leeds, Sch Phys & Astron, Leeds LS2 9JT, W Yorkshire, England

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 09期

基金：

英国工程与自然科学研究理事会; 英国科学技术设施理事会;

关键词：

X-RAY; BIFEO3; CRYSTAL; DISPLACEMENTS; TITANATE;

D O I：

10.1063/1.3116735

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Neutron diffraction data were collected from sintered polycrystalline 0.9BiFeO(3)-0.1PbTiO(3) at temperatures between 293 and 793 K and the crystal and magnetic structures refined by the Rietveld method. An antiferromagnetic Neel temperature of 592 K was determined from a Brillouin fit to the refined magnetic moments with a ground state of 4.34 mu(B), showing no loss of moment per Fe site compared to BiFeO3. Some magnetic order was observed to persist above the Neel temperature. A maximum in the spontaneous rhombohedral strain was observed close to the Neel temperature, in a significant departure from typical Landau behavior for a ferroelectric and suggesting a coupling between the magnetic and nuclear structures. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3116735]

引用

页数：6

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