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Mössbauer effect and electron spin resonance study of CdxMg1−xFe2O4 system

مجلة

Hyperfine Interactions

الناشر

Springer Netherlands

الرقم الدولي الموحد للدورية(ردمد)

0304-3843 (Print) 1572-9540 (Online)

العدد

Volume 28, Numbers 1-4 / فبراير, 1986

DOI

10.1007/BF02061576

الصفحات:

843-847

Subject Collection

الفيزياء وعلم الفلك

تاريخ SpringerLink

14 اغسطس, 2005

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Mössbauer effect and electron spin resonance study of CdxMg1–xFe2O4 system

N. A. Eissa1, H. A. Sallam1, S. H. Salah1, A. F. Mira1 and Adel Hassib1, 2

(1) 

Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt

 

(2) 

Phys.Dept. Faculty of Science, King Saud Univ., Ryadh, Saudi-Arabia

Abstract  This work deals with the application of Mossbauer Effect (ME) in studying the crystal electric field and the cation distribution among tetrahedral (A) and the octahedral (B) sites of the spinal structure in the ferrite system Cdx Mg1–x Fe2O4 (x=0, 0.2,...1). The electron spin resonance technique (ESR) was also applied for studying this ferrite system. It was possible to characterize the ESR spectra of ferrite through the combination with the ME spectra.

The ESR spectra of magnesium ferrite showed two resonance positions of Fe3+ ions and indicated that a strong exchange interaction is dominant in the pure Mg-ferrite. For high Cd concentration ferrites only single resonance line was observed. These results could be interpretted on the basis of the ME results where it indicated that Cd2+ ions prefer tetrahedral positions, forcing the Fe3+ ions from these positions to join those in the octahedral sites. The complete site occupation with different types of cations was successfully achieved from the ME spectra. The values of the quadrupole splitting indicated that for each ferrite in the system there exists an electric field gradient surrounding the Fe3+ ions in each of the octahedral and tetrahedral sites. The increase in the Mg-concentration increases the symmetry of the electric field at these sites.


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Application of Mössbauer spectroscopy in investigating Egyptian archaeology

مجلة

Hyperfine Interactions

الناشر

Springer Netherlands

الرقم الدولي الموحد للدورية(ردمد)

0304-3843 (Print) 1572-9540 (Online)

العدد

Volume 41, Number 1 / ديسمبر, 1988

فئة

Mineralogy Geology Archaeology

DOI

10.1007/BF02400506

الصفحات:

779-782

Subject Collection

الفيزياء وعلم الفلك

تاريخ SpringerLink

12 مايو, 2006

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Mineralogy Geology Archaeology

Application of Mössbauer spectroscopy in investigating Egyptian archaeology

N. A. Eissa1 and H. A. Sallam1

(1) 

Mössbauer Laboratory, Faculty of Science, Al Azhar University, Nasr City, Cairo, Egypt

Abstract  This article summarizes the results of applications of the Mössbauer spectroscopy to investigate Ancient Egyptian pottery from the periods: Ancient Egyptian (3200–525 B.C.) Greek-Roman (320 B.C.–640 A.C.) and Early Islamic (800–1000 A.C.). Many objective informations deduced about: provinance, manufacturing techniques for different domestic purposes, civilization transfer between the Arab countries, methods of colouration and applying decorating glazes, and finally dating of ancient pottery.


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10.  N. A. Eissa and S. H. Salah, M. Y. Hassaan, and A. F. Mira, Mössbauer Effect Study on the Magnetic and Thermal Behaviour of the Cd - Mg Ferrite system, Materials science and Engineering, 77 (1986) 149-153.

 

 

Title:

 

Mössbauer effect and electron spin resonance study of CdxMg1‑xFe2O4 system

Authors:

 

Eissa, N. A.; Sallam, H. A.; Salah, S. H.; Mira, A. F.; Hassib, Adel

Affiliation:

 

AA(Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University), AB(Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University), AC(Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University), AD(Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University), AE(Mössbauer Laboratory, Physics Department, Faculty of Science, Al-Azhar University; Phys.Dept. Faculty of Science, King Saud Univ.)

Publication:

 

Hyperfine Interactions, Volume 28, Issue 1-4, pp. 843-847

Publication Date:

 

02/1986

Origin:

 

SPRINGER

Abstract Copyright:

 

(c) 1986: J.C. Baltzer A.G., Scientific Publishing Company

DOI:

 

10.1007/BF02061576

Bibliographic Code:

 

1986HyInt..28..843E

Abstract

This work deals with the application of Mossbauer Effect (ME) in studying the crystal electric field and the cation distribution among tetrahedral (A) and the octahedral (B) sites of the spinal structure in the ferrite system Cdx Mg1‑x Fe2O4 (x=0, 0.2,...1). The electron spin resonance technique (ESR) was also applied for studying this ferrite system. It was possible to characterize the ESR spectra of ferrite through the combination with the ME spectra. The ESR spectra of magnesium ferrite showed two resonance positions of Fe3+ ions and indicated that a strong exchange interaction is dominant in the pure Mg-ferrite. For high Cd concentration ferrites only single resonance line was observed. These results could be interpretted on the basis of the ME results where it indicated that Cd2+ ions prefer tetrahedral positions, forcing the Fe3+ ions from these positions to join those in the octahedral sites. The complete site occupation with different types of cations was successfully achieved from the ME spectra. The values of the quadrupole splitting indicated that for each ferrite in the system there exists an electric field gradient surrounding the Fe3+ ions in each of the octahedral and tetrahedral sites. The increase in the Mg-concentration increases the symmetry of the electric field at these sites.

 

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