Mössbauer and Neutron Diffraction Studies on Co–Al Ferrite: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

Author： Kim Sam Jin   Jung Kwang-Deog   Kim Chul Sung  

Publisher： Springer Publishing Company

ISSN： 0304-3843

Source： Hyperfine Interactions, Vol.156, Iss.1, 2004-06, pp. : 113-122

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

Al substituted CoAlxFe1−xO4 (x=0.1, 0.2, 0.3, and 0.5) have been studied with X-ray and neutron diffraction, Mössbauer spectroscopy and magnetization measurements. Neutron diffraction at 10 K for CoAl0.1Fe1.9O4 revealed a cubic spinel structure of ferrimagnetic long range ordering, with magnetic moments of Fe3+(A)(−4.18 μB), Fe3+(B)(4.81 μB), Co2+(B)(2.99 μB), respectively.The temperature dependence of the magnetic hyperfine field in 57Fe nuclei at the tetrahedral (A) and octahedral (B) sites was analyzed based on the Néel theory of magnetism. In the sample CoAl0.1Fe1.9O4, the intersublattice A–B interaction and intrasublattice A–A superexchange interaction were antiferromagnetic with strengths of JA–B=−23.3 kB and JA–A=−17.6 kB, respectively, while the intrasublattice B–B superexchange interaction was found to be ferromagnetic with a strength of JB–B=5.5 kB. With increasing Al substitution the A–B and B–B interaction decreased but the A–A interaction increased. It is interpreted that the reduction of magnetic moment in Fe3+(A) and a noticeable strength of the A–A interaction are closely related to the covalency effects.

Related content

Concluding Remarks: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

By Gancedo J. R.  

Hyperfine Interactions, Vol. 156, Iss. 1, 2004-06 ,pp. : 649-651 (3)

Springer Publishing Company

Access to resources Recommend Favorite

Preface: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

By Elzain Mohamed   Yousif Ali   Al Rawas Ahmed   Gismelseed Abbasher  

Hyperfine Interactions, Vol. 156, Iss. 1, 2004-06 ,pp. : 1-2 (2)

Springer Publishing Company

Access to resources Recommend Favorite

Mössbauer Study of Microstructure and Magnetic Properties (Co, Ni)–Zr Substituted Ba Ferrite Particles: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

By Gruskova A.   Lipka J.   Papanova M.   Kevicka D.   Gonzalez A.   Mendoza G.   Toth I.   Slama J.  

Hyperfine Interactions, Vol. 156, Iss. 1, 2004-06 ,pp. : 187-194 (8)

Springer Publishing Company

Access to resources Recommend Favorite

Mössbauer Spectroscopy Study on the Effect of Al–Cr Co-Substitution in Yttrium and Yttrium–Gadolinium Iron Garnets: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

By Lehlooh A.-F.   Mahmood S.   Mozaffari M.   Amighian J.  

Hyperfine Interactions, Vol. 156, Iss. 1, 2004-06 ,pp. : 181-185 (5)

Springer Publishing Company

Access to resources Recommend Favorite

Magnetic Properties of TlCo2Se2 Studied by Mössbauer Spectroscopy: Proceedings of the 27th International Conference on the Applications of the Mössbauer Effect (ICAME 2003) Muscat, Oman, 21–25 September, 2003 (Guest Editors: M. E. Elzain, A. A. Yousif, A. D. Al Rawas and A. M. Gismelseed)

By Kamali Saeed   Häggström Lennart   Ronneteg Sabina   Berger Rolf  

Hyperfine Interactions, Vol. 156, Iss. 1, 2004-06 ,pp. : 315-319 (5)

Springer Publishing Company

Access to resources Recommend Favorite