μ+-SR studies of the weak ferromagnets CoCO3 and NiCO3

被引：6

作者：

Lancaster, T

Blundell, SJ

Pratt, FL

Kurmoo, M

机构：

[1] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England

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

[3] IPCMS, F-67037 Strasbourg, France

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 326卷 / 1-4期

基金：

英国工程与自然科学研究理事会;

关键词：

cobalt carbonate; nickel carbonate; Dzyaloshinsky-Moriya interaction;

D O I：

10.1016/S0921-4526(02)01681-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present the results of zero-held mu(+)-SR measurements on CoCO3 and NiCO3. Both compounds are rhombohedral antiferromagnets which exhibit a spontaneous weak magnetisation below 22.2 and 17.2 K, respectively. This arises due to an anisotropic superexchange (Dzyaloshinsky-Moriya) interaction. We have studied the temperature dependence of the internal field in the ordered state and the magnetic fluctuations in the paramagnetic state. We describe the possible muon-site obtained from dipolar-field calculations. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：522 / 526

页数：5

共 8 条

[1]

BOROVIKROMANOV AS, 1961, SOV PHYS JETP-USSR, V12, P18

[2]

BOROVIKROMANOV AS, 1957, SOV PHYS JETP-USSR, V4, P531

[3] MAGNETIZATION DENSITY AND MAGNETIC STRUCTURE OF COBALT CARBONATE [J].

BROWN, PJ ;

WELFORD, PJ ;

FORSYTH, JB .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1973, 6 (08) :1405-1421

[4]

KREINES NM, 1970, SOV PHYS JETP-USSR, V31, P280

[5]

Kurmoo M, 2002, MOL CRYST LIQ CRYST, V379, P271, DOI [10.1080/713738597, 10.1080/10587250290090598]

[6]

LI Q, 1990, HYPERFINE INTERACT, V63, P169, DOI 10.1007/BF02396000

[7] WEAK FERROMAGNETISM IN NICO3 [J].

PLUMIER, R ;

SOUGI, M ;

LECOMTE, M ;

SAINTJAMES, R .

JOURNAL OF APPLIED PHYSICS, 1985, 57 (08) :3261-3263

[8] NEUTRON-DIFFRACTION REINVESTIGATION OF NICO3 [J].

PLUMIER, R ;

SOUGI, M ;

SAINTJAMES, R .

PHYSICAL REVIEW B, 1983, 28 (07) :4016-4020

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