Fe cation occupancies in GaFeO3 prepared by sol-gel and solid state reaction

被引：16

作者：

Szymanski, K. ^{[1
]}

Dobrzynski, L. ^{[1
,2
]}

Bakr, M. ^{[4
]}

Satula, D. ^{[1
]}

Olszewski, W. ^{[1
]}

Parzych, G. ^{[2
,3
]}

Fuess, H. ^{[4
]}

机构：

[1] Univ Bialystok, Fac Phys, PL-15424 Bialystok, Poland

[2] Soltan Inst Nucl Studies, PL-05400 Otwock, Poland

[3] IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany

[4] Tech Univ Darmstadt, Inst Mat Sci, D-64289 Darmstadt, Germany

来源：

PHASE TRANSITIONS | 2010年 / 83卷 / 10-11期

关键词：

Mossbauer spectroscopy; neutron powder diffraction; multiferroics; GaFeO3; IRON-OXIDE; GA2-XFEXO3; CRYSTAL;

D O I：

10.1080/01411594.2010.509148

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

In this study, the Mossbauer spectroscopy and the neutron powder diffraction were used for the characterisation of GaFeO3 samples prepared by two different methods, solid state reaction and sol-gel synthesis. The samples have similar structures that differ in distributions of Fe and Ga among the pertinent sites. The samples also differ in magnetic transition temperatures. We studied how to adopt the method of invariants, developed earlier for decomposition of the Mossbauer spectra into site components, to the case of magnetic interactions dominating over small quadrupole interactions. A combined neutron and Mossbauer data analysis has led to the determination of site assignment and the occupancies.

引用

页码：824 / 835

页数：12

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