MOSSBAUER AND INFRARED STUDIES OF THE CU-CR FERRITES

被引：20

作者：

AMER, MA ^{[1
]}

AHMED, MA ^{[1
]}

ELNIMR, MK ^{[1
]}

MOSTAFA, MA ^{[1
]}

机构：

[1] UNIV ALEXANDRIA,FAC EDUC,ALEXANDRIA,EGYPT

来源：

HYPERFINE INTERACTIONS | 1995年 / 96卷 / 1-2期

关键词：

D O I：

10.1007/BF02066275

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Ferrites of the system CuCrxFe2-xO4, where x = 0, 0.2, 0.4, 0.6 and 0.8, have been studied by Mossbauer and IR absorption spectra. Mossbauer spectra were recorded at room temperature. The spectra of all samples showed two well defined Zeeman patterns corresponding to A and B sites. The effect of the variation of chromium substitution on the various hyperfine interactions has been discussed. The cationic distribution makes clear that all Cr3+ ions occupy octahedral sites. The IR spectra in the range 200-4000 cm(-1) showed the presence of four bands. The high and low frequency bands nu(1) and nu(2) belong to the tetrahedral and octahedral sites, respectively. Small. bands nu(3) and nu(4) are observed around nu(2) and are assigned to the octahedral divalent metal-oxygen ion complexes and the lattice vibrations of the system, respectively.

引用

页码：91 / 98

页数：8

共 27 条

[1] MOSSBAUER RESONANCE OF 57FE IN OXIDIC SPINELS CONTAINING COPPER AND IRON [J].