MAGNETIZATION MEASUREMENT OF NENP AND NINO IN HIGH MAGNETIC-FIELD

被引：39

作者：

TAKEUCHI, T

ONO, M

HORI, H

YOSIDA, T

YAMAGISHI, A

DATE, M

机构：

[1] OSAKA UNIV,CTR LOW TEMP,TOYONAKA,OSAKA 560,JAPAN

[2] OSAKA UNIV,EXTREME MAT RES CTR,TOYONAKA,OSAKA 560,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1992年 / 61卷 / 09期

关键词：

MAGNETIZATION; MAGNETIC SUSCEPTIBILITY; LINEAR-CHAIN HEISENBERG ANTIFERROMAGNET; HALDANE GAP; NENP; NINO;

D O I：

10.1143/JPSJ.61.3255

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetization measurements have been performed on the single crystal samples of Ni(C2H8N2)2NO2(ClO4), NENP, and Ni(C3H10N2)2NO2(ClO4), NINO in pulsed high magnetic fields. No magnetization appears up to about 10 T reflecting the presence of the Haldane gap and the linear magnetization appears in both compounds above this field. The observed anisotropy of the transition field is explained by the Haldane gap energy E(g) and the crystalline field constants D and E in the lowest excited triplet. The parameters are estimated as E(g) = 16.8 K, D = -16.1 K, and E = -1.3 K and E(g) = 14.2 K, D = -11.5 K and E = 2.1 K for NENP and NINO, respectively.

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页码：3255 / 3261

页数：7

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