Magnetic phase diagram of layered cobalt dioxide LixCoO2

被引：65

作者：

Mukai, K. ^{[1
]}

Ikedo, Y.

Nozaki, H.

Sugiyama, J.

Nishiyama, K.

Andreica, D.

Amato, A.

Russo, P. L.

Ansaldo, E. J.

Brewer, J. H.

Chow, K. H.

Ariyoshi, K.

Ohzuku, T.

机构：

[1] Toyota Cent Res & Dev Labs Inc, Aichi 4801192, Japan

[2] High Energy Accelerator Res Org, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[3] Paul Scherrer Inst, Lab Muon Spin Spect, Villigen, Switzerland

[4] TRIUMF, Vancouver, BC V6T 2A3, Canada

[5] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[6] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada

[7] Osaka City Univ, Grad Sch Engn, Dept Appl Chem, Osaka 5588585, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.99.087601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetism of LixCoO2 (LCO), which has a similar structure to NaxCoO2 (NCO), has been investigated by muon-spin spectroscopy and susceptibility measurements using samples with x=0.1-1 prepared by an electrochemical reaction. In the x range below 0.75, LCO was found to be Pauli paramagnetic down to 1.8 K, suggesting an intermediate- or weak-coupling regime, although disordered local moments, with volume fractions below similar to 20%, appear at low T for LCO with x >= 0.5. The phase diagram and interactions of LCO are thus strikingly different from NCO, while the differences cannot be explained simply by structural differences between the two systems.

引用

页数：4

共 24 条

[1] Dynamical mean-field study of the Mott transition in the half-filled Hubbard model on a triangular lattice [J].