Magnetic order in the double pyrochlore Tb2Ru2O7

被引：14

作者：

Chang, L. J. ^{[1
]}

Prager, M. ^{[2
]}

Persson, J. ^{[2
]}

Walter, J. ^{[3
]}

Jansen, E. ^{[3
]}

Chen, Y. Y. ^{[4
]}

Gardner, J. S. ^{[5
]}

机构：

[1] Natl Tsing Hua Univ, Nucl Sci & Technol Dev Ctr, Hsinchu 30013, Taiwan

[2] Forschungszentrum Julich, Inst Festkoerperforsch, D-52425 Julich, Germany

[3] Univ Bonn, MIN ZFR, Aussenstelle Forschungszentrum Julich, Mineral Petrol Inst, D-52425 Julich, Germany

[4] Acad Sinica, Inst Phys, Nankang 115, Taiwan

[5] Indiana Univ, Dept Phys, Bloomington, IN 47408 USA

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2010年 / 22卷 / 07期

关键词：

R2RU2O7; R; HEAT; SUSCEPTIBILITY; DYNAMICS; STATE;

D O I：

10.1088/0953-8984/22/7/076003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Polycrystalline Tb2Ru2O7 has been studied using dc susceptibility, specific heat and neutron scattering techniques. The high temperature paramagnetic state is dominated by the single ion character of Tb3+ and very similar to that of the well-studied spin liquid Tb2Ti2O7. However, both the Ru4+ and Tb3+ sublattices order, at about 110 K and 3.5 K, respectively. Although the Tb sublattice does not fully order until 3.5 K, it is polarized in the presence of the internal field generated by the Ru4+ sublattice and possesses a significant moment at 7 K. Magnetic entropy measurements suggest that four levels exist in the first 30 K and inelastic neutron scattering investigations revealed two more levels at 10 and 14 meV. As the magnetic sublattices order, the excitations are perturbed from that measured in the paramagnetic state. These data are compared to data for other terbium based and double pyrochlores.

引用

页数：5

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