Complex phase transitions in stable thiazyl radicals: spin-gap, antiferromagnetic ordering and double melting

被引：60

作者：

Fujita, W

Awaga, K ^{[1
]}

Nakazawa, Y

Saito, K

Sorai, M

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Chem, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[2] Nagoya Univ, Res Ctr Mat Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan

[3] Osaka Univ, Grad Sch Sci, Res Ctr Mol Thermodynam, Osaka 5600043, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 352卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(01)01477-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We examined the magnetic and thermal properties of a stable thiazyl radical 1,3,2-benzodithiazolyl, BDTA. While the diamagnetic room-temperature phase had been known for BDTA, we found a new phase transition to a paramagnetic solid phase at 346 K and a superheating process that resulted in the double melting (melt recrystallization-melt process) above 360 K. The supercooling of the paramagnetic high-temperature phase also occurred, leading to an antiferromagnetic ordering at 11 K with gamma-type anomaly in the temperature dependence of the heat capacity. Based on these data, the complex phase diagram of BDTA has been determined. (C) 2002 Published by Elsevier Science B.V.

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页码：348 / 352

页数：5

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