Field-induced magnetic ordering in the Haldane system PbNi2V2O8 -: art. no. 104402

被引：27

作者：

Tsujii, N ^{[1
]}

Suzuki, O ^{[1
]}

Suzuki, H ^{[1
]}

Kitazawa, H ^{[1
]}

Kido, G ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.72.104402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Haldane system PbNi2V2O8 was investigated by temperature-dependent magnetization M(T) measurements at fields higher than H-c; H-c is the critical field required to close the Haldane gap. It has been revealed that for H > H-c, M(T) exhibits a cusplike minimum at T-min, below which it increases with a decrease in T following a convex curve. These results were observed for both H parallel to c and H perpendicular to c, with the c axis parallel to the chain. These data indicate the occurrence of field-induced magnetic ordering around T-min. The phase boundaries for H parallel to c and H perpendicular to c do not cross each other. This result is consistent with the theoretical calculation for a negative single-ion anisotropy D.

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