WEAK FERROMAGNETISM AND MAGNETICALLY MODULATED MICROWAVE-ABSORPTION AT LOW MAGNETIC-FIELDS IN 1,3,5-TRIPHENYL-6-OXOVERDAZYL

被引：51

作者：

KREMER, RK

KANELLAKOPULOS, B

BELE, P

BRUNNER, H

NEUGEBAUER, FA

机构：

[1] KERNFORSCHUNGSZENTRUM,INST HEISSE CHEM,D-76021 KARLSRUHE,GERMANY

[2] MAX PLANCK INST MED RES,ORGAN CHEM ABT,D-69028 HEIDELBERG,GERMANY

来源：

CHEMICAL PHYSICS LETTERS | 1994年 / 230卷 / 03期

关键词：

D O I：

10.1016/0009-2614(94)01137-0

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：

The magnetic susceptibility and microwave properties of powder samples of 1,3,5-triphenyl-6-oxoverdazyl were investigated between room temperature and 1.8 K. The high-temperature susceptibility follows a Curie-Weiss law with a Curie constant of 0.38(1) emu K mol-1 and a Weiss constant of -12(2) K. At low temperature we find 1D magnetic behaviour evidenced by a broad maximum in the susceptibility. Below 4.9 K weak ferromagnetism is detected which is attributed to a canting of the antiferromagnetic sublattices of about 0.13-degrees. Strong nonresonant microwave absorption appears below 4 K which exhibits a hysteresis when measured in a small scanned external field. Possible origins of the weak ferromagnetism and the nonresonant microwave absorption are discussed.

引用

页码：255 / 259

页数：5

共 36 条

[21]

Miller J. S., 1994, ANGEW CHEM, V106, P399

[22] ORGANIC AND ORGANOMETALLIC MOLECULAR MAGNETIC-MATERIALS - DESIGNER MAGNETS [J].