Anomalous magnetic properties of polycondensate of fused poly nuclear aromatics(COPNA) resin

Author

Nakajima, Shigeru ; Iijima, Y. ; Inoue, Takeru ; Taniuchi, M. ; Ujiie, Kenji

Author_Institution

RICOH Co., Ltd.

fYear

1994

fDate

24-29 July 1994

Firstpage

62

Lastpage

62

Abstract

Summary form only given. The magnetic properties of the COPNA resin pre pared by photoirradiation have been studied by ESR and SQUID measurements. ESR spectra were obtained as a singlet with g=2.0035. The temperature dependence of the susceptibility (X) is shown in the figure. In the 50-150K temperature region, the value of X doesn´t follow Curie law. The X value gradually increased with time. The intensity of the ESR signal decreased in the same temperature region. Furthermore, this intensity decreased extraordinarily with increase of oxygen pressure in the sample. It was also found that this anomalous magnetic properties characteristic to the COPNA resin was related to the changes of molecular weight distribution by photoirradiation. It is considered that this behavior is due to the structural changes related to oxygen.

Keywords

Conductivity; Crystalline materials; Electrons; Frequency dependence; Magnetic properties; Paramagnetic resonance; Physics; Resins; Temperature dependence; Temperature sensors;

fLanguage

English

Publisher

ieee

Conference_Titel

Science and Technology of Synthetic Metals, 1994. ICSM '94. International Conference on

Conference_Location

Seoul, Korea

Type

conf

DOI

10.1109/STSM.1994.834740

Filename

834740