Coupled magnetic and structural transitions in EuMn2O5 as studied by neutron diffraction and three-dimensional polarization analysis

被引：51

作者：

Polyakov, V ^{[1
]}

Plakhty, V

Bonnet, M

Burlet, P

Regnault, LP

Gavrilov, S

Zobkalo, I

Smirnov, O

机构：

[1] RAS, Petersburg Nucl Phys Inst, St Petersburg 188300, Russia

[2] CEA, DRFMC, SPSMC, F-38054 Grenoble, France

来源：

PHYSICA B | 2001年 / 297卷 / 1-4期

关键词：

EuMn2O5; simultaneous magnetic and ferroelectric transitions; polar atomic displacements; three-dimensional polarization analysis;

D O I：

10.1016/S0921-4526(00)00851-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A number of magnetic and structural phase transitions in EuMn2 O-5 is observed below T-N similar or equal to 40K by neutron (1/2(0.03)). A ferroelectric transition occurs at T-N with the polar displacements of Mn3+ ions along axis a. Three-dimentional dimensional polarization analysis has shown, that magnetic moments lie in a-c plane down to T-1 similar or equal to 22K. Second structural transition, mainly due to the polar shifts of the Mn4+ ions along c, is observed at T-1. It is accompanied by a magnetic phase transition and by appearance of the b-component of spins. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：208 / 212

页数：5

共 14 条

[1] CRYSTAL STRUCTURE OF PARAMAGNETIC DYMN2O5 AT 298 DEGREES K [J].

ABRAHAMS, SC ;

BERNSTEIN, JL .

JOURNAL OF CHEMICAL PHYSICS, 1967, 46 (10) :3776-+

[2]

BECKER P, 1959, ACTA CRYST ALLOGR, V12, P261

[3]

BROWN PJ, 1993, 93009 RAL

[4] SINUSOID AND HELICOID MAGNETIC STRUCTURES OF RARE-EARTHS IN TMNO5 [J].

BUISSON, G .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1973, 17 (01) :191-198

[5]

DOI T, 1992, PHASE TRANSIT, V38, P273, DOI 10.1080/01411599208213207

[6] THE MAGNETIC-STRUCTURES OF THE RARE-EARTH MANGANATES ERMN2O5 AND TBMN2O5 [J].

GARDNER, PP ;

WILKINSON, C ;

FORSYTH, JB ;

WANKLYN, BM .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (33) :5653-5661

[7]

Golovenchits E. I., 1992, Soviet Physics - Solid State, V34, P56

[8] CROSS-CORRELATION POLARIZED NEUTRON SPECTROMETER [J].

GUKASOV, AG ;

PLAKHTY, VP ;

POLYAKOV, VA ;

ZOBKALO, IA .

PHYSICA B, 1992, 180 :1007-1010

[9] POLARIZATION ANALYSIS OF THERMAL-NEUTRON SCATTERING [J].

MOON, RM ;

RISTE, T ;

KOEHLER, WC .

PHYSICAL REVIEW, 1969, 181 (02) :920-&

[10]

NAISH VE, 1976, SYROMJATNIKOV SUBGRO

← 1 2 →