Weak ferromagnetism in CuB2O4 copper metaborate

被引：74

作者：

Petrakovskii, G ^{[1
]}

Velikanov, D

Vorotinov, A

Balaev, A

Sablina, K

Amato, A

Roessli, B

Schefer, J

Staub, U

机构：

[1] Russian Acad Sci, Siberian Branch, Inst Phys, Krasnoyarsk 660036, Russia

[2] Paul Scherrer Inst, Dept Particles & Mat, Mu SR, CH-5232 Villigen, Switzerland

[3] ETH Zurich, Neutron Scattering Lab, CH-5232 Villigen, Switzerland

[4] Swiss Lignt Sourse, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 205卷 / 01期

关键词：

weak ferromagnetism; magnetic phase transition; morin transition; specific heat; muon spin relaxation;

D O I：

10.1016/S0304-8853(99)00449-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The results of the magnetic susceptibility, magnetization, specific heat and mu SR measurements of the tetragonal CuB2O4 single crystals are presented. CuB2O4 is a paramagnet at temperatures above 21 K. The paramagnetic Neel temperature and effective magnetic moment determined from high-temperature magnetic susceptibility measurements are equal to theta = -9.5 K, mu(eff) = 1.77 mu(B), respectively. The easy plane magnetic structure with a weak spontaneous magnetic moment was determined in the temperature range 21-10 K. The value of the weak spontaneous magnetic moment is m(0) = 0.56 emu/g at T = 10 K. Morin magnetic phase transition was observed at the temperature T-M = 10 K. The mu SR measurements confirm the existence of two magnetic phase transition at T = 21 and 10 K. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：105 / 109

页数：5

共 7 条

[1] SUSCEPTIBILITY AND EXCITATION SPECTRUM OF (VO)2P2O7 IN LADDER AND DIMER-CHAIN MODELS [J].

BARNES, T ;

RIERA, J .

PHYSICAL REVIEW B, 1994, 50 (10) :6817-6822

[2] Magnetic susceptibilities of AV(2)O(5) (A=Li and Cs) with square pyramidal V(IV)O-5 [J].

Isobe, M ;

Ueda, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (10) :3142-3145

[3] CRYSTAL STRUCTURE OF COPPER METABORATE, CUB2O4 [J].

MARTINEZRIPOLL, M ;

MARTINEZ.S ;

GARCIABL.S .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL CRYSTALLOGRAPHY AND CRYSTAL CHEMISTRY, 1971, B 27 (MAR) :677-+

[4] ANISOTROPIC SUPEREXCHANGE INTERACTION AND WEAK FERROMAGNETISM [J].

MORIYA, T .

PHYSICAL REVIEW, 1960, 120 (01) :91-98

[5] Magnetic susceptibility of ideal spin 1/2 Heisenberg antiferromagnetic chain systems, Sr2CuO3 and SrCuO2 [J].

Motoyama, N ;

Eisaki, H ;

Uchida, S .

PHYSICAL REVIEW LETTERS, 1996, 76 (17) :3212-3215

[6]

PETRAKOVSKII GA, IN PRESS SOV KRYSTAL

[7]

ZARGAROVA MI, 1996, IAN SSSR NEORG MATER, V32, P74

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