STUDIES OF CHROMIUM-DOPED SODIUM AMMONIUM-SULFATE DIHYDRATE .1. ELECTRON-PARAMAGNETIC-RESONANCE OF CR3+

被引：14

作者：

BAKER, JM ^{[1
]}

KURIATA, J ^{[1
]}

OCONNELL, AC ^{[1
]}

SADLOWSKI, L ^{[1
]}

机构：

[1] TECH UNIV SZCZECIN,INST FIZ,PL-70310 SZCZECIN,POLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 11期

关键词：

D O I：

10.1088/0953-8984/7/11/010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electron paramagnetic resonance (EPR) of Cr3+ ions has been observed in single crystals of sodium ammonium sulphate dihydrate (SASD) doped with chromium. At 300 K the spectrum is relatively simple, exhibiting two main different sites, labelled alpha and beta. The spin-Hamiltonian parameters for these sites have been measured. The relative concentration of different paramagnetic sites shows marked sensitivity to unknown factors in the crystal growth. On lowering the temperature the spectrum becomes very complex, making detailed study of the various sites, and changes at any phase transition, impossible to elucidate. None of the spectra shows a marked change at the ferroelectric transition temperature, T-c = 92 K.

引用

页码：2321 / 2331

页数：11

共 14 条

[1] MECHANISM OF FERROELECTRIC PHASE-TRANSITION IN NANH4SEO4.2H2O [J].