Cascade of bulk magnetic phase transitions in NaxCoO2 as studied by muon spin rotation -: art. no. 136403

被引：74

作者：

Mendels, P ^{[1
]}

Bono, D

Bobroff, J

Collin, G

Colson, D

Blanchard, N

Alloul, H

Mukhamedshin, I

Bert, F

Amato, A

Hillier, AD

机构：

[1] Univ Paris 11, UMR 8502, Phys Solides Lab, F-91405 Orsay, France

[2] Ctr Etud Saclay, CEA, CNRS, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France

[3] Ctr Etud Saclay, CEA, CNRS, SPEC, F-91191 Gif Sur Yvette, France

[4] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.94.136403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using muon spin rotation, well-defined bulk similar to 100% magnetic phases in NaxCoO2 are revealed. A novel magnetic phase is detected for x=0.85 with the highest transition temperature ever observed for x >= 0.75. This stresses the diversity of x >= 0.75 magnetic phases and the link between magnetic and structural degrees of freedom. For the charge-ordered x=0.50 compound, a cascade of transitions is observed below 85 K. From a detailed analysis of our data, we conclude that the ordered moment varies continuously with temperature and suggest that the two secondary transitions at 48 and 29 K correspond to a moderate reorientation of antiferromagnetically coupled moments.

引用

页数：4

共 10 条

[1] Bulk antiferromagnetism in Na0.82CoO2 single crystals -: art. no. 100410 [J].