Static magnetic susceptibility, crystal field and exchange interactions in rare earth titanate pyrochlores

被引：81

作者：

Malkin, B. Z. ^{[1
]}

Lummen, T. T. A. ^{[2
]}

van Loosdrecht, P. H. M. ^{[2
]}

Dhalenne, G. ^{[3
]}

Zakirov, A. R. ^{[1
]}

机构：

[1] Kazan VI Lenin State Univ, Kazan 420008, Russia

[2] Univ Groningen, Zernike Inst Adv Mat, NL-9747 AG Groningen, Netherlands

[3] Univ Paris 11, Lab Phys Chim Letat Solide, ICMMO, UMR 8182, F-91405 Orsay, France

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 27期

基金：

俄罗斯基础研究基金会;

关键词：

ANTIFERROMAGNET TB2TI2O7; SINGLE-CRYSTAL; SPIN ICE; HO2TI2O7; GD2TI2O7; HEAT; TRANSITION; DY2TI2O7; GD2SN2O7; YB2TI2O7;

D O I：

10.1088/0953-8984/22/27/276003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The experimental temperature dependence (T = 2-300 K) of single crystal bulk and site susceptibilities of rare earth titanate pyrochlores R2Ti2O7 (R = Sm, Eu, Gd, Tb, Dy, Ho, Er, Yb) is analyzed in the framework of crystal field theory and a mean field approximation. Analytical expressions for the site and bulk susceptibilities of the pyrochlore lattice are derived taking into account long range dipole-dipole interactions and anisotropic exchange interactions between the nearest neighbor rare earth ions. The sets of crystal field parameters and anisotropic exchange coupling constants have been determined and their variations along the lanthanide series are discussed.

引用

页数：11

共 54 条

[1]

Abragam A., 1970, ELECT PARAMAGNETIC R

[2]

ALEXANDROV IV, 1985, SOV PHYS JETP, V62, P1287

[3]

[Anonymous], 1932, NATURE, DOI DOI 10.1038/130490A0

[4] Far infrared optical properties of the pyrochlore spin ice compound Dy2Ti2O7 [J].