AN EPR INVESTIGATION OF CR-3+ AND NI-2+ IN SYNTHETIC PYRITE CRYSTALS

被引：17

作者：

SIEBERT, D ^{[1
]}

MILLER, R ^{[1
]}

FIECHTER, S ^{[1
]}

DULSKI, P ^{[1
]}

HARTMANN, A ^{[1
]}

机构：

[1] HAHN MEITNER INST KERNFORSCH BERLIN GMBH,ABT MATERIALFORSC,BERLIN,GERMANY

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES | 1990年 / 45卷 / 11-12期

关键词：

PYRITE; EPR; PARAMAGNETIC IONS; CONDUCTIVITY;

D O I：

10.1515/zna-1990-11-1207

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：

In many synthetic pyrite single crystals of high quality and purity we could detect Cr3+ and Ni2+ by EPR at 78 K as unwanted impurities. The assignment was possible by means of the isotopes Cr-53 and Ni-61 occurring in natural abundance. The paramagnetic centers exhibit unusual g-values. In case of Ni2+ a ligand hyperfine interaction could be observed beside the normal hyperfine interaction with the Ni-61 nucleus. For some crystals the Cr3+ signal intensity could be increased up to ten times by temperature increasement from 78 K to about 100 K. At 78 K the Cr3+ intensity was quenched by IR irradiation.

引用

页码：1267 / 1272

页数：6

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