Depth-dependent spin dynamics in TbMnO3 thin films measured by low energy muon spin relaxation Depth-dependent spin dynamics in TbMnO3 thin films measured by low energy muon spin relaxation

被引：6

作者：

Bator, Matthias ^{[1
]}

Hu, Yi ^{[1
]}

Luetkens, Hubertus ^{[2
]}

Niedermayer, Christof ^{[2
]}

Prokscha, Thomas ^{[2
]}

Suter, Andreas ^{[2
]}

Salman, Zaher ^{[2
]}

Kenzelmann, Michel ^{[2
]}

Schneider, Christof W. ^{[1
]}

Lippert, Thomas ^{[1
]}

机构：

[1] Paul Scherrer Inst, Dept Gen Energy, Villigen, Switzerland

[2] Paul Scherrer Inst, Dept Res Neutrons & muons, Villigen, Switzerland

来源：

12TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE (MUSR2011) | 2012年 / 30卷

基金：

瑞士国家科学基金会;

关键词：

Multiferroic; spin dynamics; rare-earth manganate; low energy muSR;

D O I：

10.1016/j.phpro.2012.04.058

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on low energy muon measurements performed on 100 nm and 28 nm thin epitaxial, highly strained and twin free TbMnO3 films grown on (110) YAlO3 substrates by pulsed laser deposition (lambda = 248nm, nu = 2 Hz, T-S = 760 degrees C). These investigations were done at the LEM beamline at the PSI, Switzerland which allowed for depth-dependent analysis of the muon spin relaxation rate as a function of temperature. A clear decrease of the relaxation rates could be observed in regions near the substrate/thin film interface compared to measurements at the surface or in the middle of the films. This behavior could be attributed to a strain-induced change of the Tb spin dynamics. Furthermore, it could be shown that the films are fully magnetic below a temperature of 40 - 50 K, which agrees well with susceptibility measurements performed on these films as well as with the bulk literature value of T-N,T-Mn = 41 K.

引用

页码：137 / 141

页数：5

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