MUON SPIN RELAXATION AND MAGNETIC-SUSCEPTIBILITY MEASUREMENTS IN THE HALDANE SYSTEM (Y2-XCAX)BA(NI1-YMGY)O-5

被引：77

作者：

KOJIMA, K

KEREN, A

LE, LP

LUKE, GM

NACHUMI, B

WU, WD

UEMURA, YJ

KIYONO, K

MIYASAKA, S

TAKAGI, H

UCHIDA, S

机构：

[1] UNIV TOKYO,MESON SCI LAB,TOKYO 113,JAPAN

[2] UNIV TOKYO,DEPT APPL PHYS,TOKYO 113,JAPAN

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.74.3471

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed dc magnetic susceptibility (χ) and muon spin relaxation (μSR) measurements of the Haldane system (Y2-xCax)Ba(Ni1-yMgy)O5, in which the chain length is controlled by Ca2+ and/or Mg2+ doping. In the nominally pure system (x=y=0), we confirmed the absence of static magnetic order down to 100 mK. Similarly, the Mg doped systems (y=1.7% and 4.1%) stay paramagnetic down to 50 mK. In the Ca doped systems (x=9.5% and 14.9%), the doping-induced unpaired moments exhibit a spin-glass-like cusp in χ, but μSR has revealed spin fluctuations persisting at 50 mK, suggesting an unconventional ground state. © 1995 The American Physical Society.

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页码：3471 / 3474

页数：4

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