Magnetic properties of lithium phthalocyanine

被引：4

作者：

Dumm, M ^{[1
]}

Nicklas, M ^{[1
]}

Loidl, A ^{[1
]}

机构：

[1] Univ Augsburg, Inst Phys, EKM, D-86135 Augsburg, Germany

来源：

SYNTHETIC METALS | 1999年 / 103卷 / 1-3期

关键词：

organic semiconductors; electron spin resonance; specific heat;

D O I：

10.1016/S0379-6779(98)00422-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic susceptibility and specific heat of the organic semiconductor lithium phthalocyanine (LiPc) are studied for temperatures 1.5 K less than or equal to T less than or equal to 300 K. LiPc has one unpaired electron on the inner ring of the macrocycle. These electrons are localized along the molecular stack and behave like spin chains. The spin susceptibility, as determined by electron spin resonance measurements, and the magnetic contribution to the heat capacity are well described by a model of a S=1/2 antiferromagnetic Heisenberg chain. The exchange constant is given by J approximate to 40 K. In comparison the iodinated compound LiPcI is ESR silent. Due to oxidizing with iodine the unpaired electrons have been removed from the macrocycle.

引用

页码：2070 / 2070

页数：1