Dilution effects in Ho2-xYxSn2O7: from the Spin Ice to the single-ion magnet

被引：8

作者：

Prando, G. ^{[1
]}

Carretta, P. ^{[1
]}

Giblin, S. R. ^{[2
]}

Lago, J. ^{[1
]}

Pin, S. ^{[3
]}

Ghigna, P. ^{[3
]}

机构：

[1] Univ Pavia, Dip Fis A Volta, I-27100 Pavia, Italy

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

[3] Univ Pavia, Dip Chim Fis M Rolla, I-27100 Pavia, Italy

来源：

HIGHLY FRUSTRATED MAGNETISM 2008 (HFM 2008) | 2009年 / 145卷

关键词：

MN12O12; ACETATE; CRYSTAL-FIELD; PROTON NMR; MU-SR; FRUSTRATION; STATE;

D O I：

10.1088/1742-6596/145/1/012033

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A study of the modifications of the magnetic properties of Ho2-xYxSn2O7 upon varying the concentration of diamagnetic Y3+ ions is presented. Magnetization and specific heat measurements show that the Spin Ice ground-state is only weakly affected by doping for x <= 0.3, even if non-negligible changes in the crystal field at Ho3+ occur. In this low doping range mu SR relaxation measurements evidence a modification in the low-temperature dynamics with respect to the one observed in the pure Spin Ice. For x -> 2, or at high temperature, the dynamics involve fluctuations among Ho3+ crystal field levels which give rise to a characteristic peak in Sn-119 nuclear spin-lattice relaxation rate. In this doping limit also the changes in Ho3+ magnetic moment suggest a variation of the crystal field parameters.

引用

页数：4

共 21 条

[1]

Abragam A., 1970, ELECT PARAMAGNETIC R

[2] Direct evidence for a dynamical ground state in the highly frustrated Tb2Sn2O7 pyrochlore [J].