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Magnetic properties of CoII, CoIII and CoII−III coordinated to a carbosilazane-based polymer
Joint Authors
Hammam, Y. A.
al-al-Ghunaym, H. M.
Arafa, I. M.
Ziq, Kh. A.
Sad, M. R.
Source
Issue
Vol. 7, Issue 1 (30 Jun. 2014), pp.23-34, 12 p.
Publisher
Yarmouk University Deanship of Research and Graduate Studies
Publication Date
2014-06-30
Country of Publication
Jordan
No. of Pages
12
Main Subjects
Topics
Abstract EN
Magnetization measurements have been performed on CoII, CoIII and CoII−III incorporated into carbosilazane-based polymeric matrix (PEDCSZ, –[(CH3)2SiNHCH2CH2NH]n--).
The local field effect has been evaluated using simple approach similar to the Weiss molecular field model in the paramagnetic state.
In this approach, the exchange interaction is represented by the average molecular field constant .
The calculated values are 327, 100 and 223 Oe-g/emu and the corresponding average molecular fields are: 2.7, 0.70 and 2.0 kOe for CoII, CoIII and CoII−III, respectively.
The corresponding molecular field values are about four orders of magnitude lower than that in elemental Co metal.
The magnetic measurements support the notion that coordination of this polycarbosilazane matrix with different valences of Co ions has pronounced effects on the exchange interaction and on the general magnetic properties of the system.
The results also indicate that the strongest exchange effects are in the CoII case, and that the magnetic properties in the mixed valance CoII- III case do not follow the simple “Additive Rule”.
American Psychological Association (APA)
Hammam, Y. A.& al-al-Ghunaym, H. M.& Arafa, I. M.& Ziq, Kh. A.& Sad, M. R.. 2014. Magnetic properties of CoII, CoIII and CoII−III coordinated to a carbosilazane-based polymer. Jordan Journal of Physics،Vol. 7, no. 1, pp.23-34.
https://search.emarefa.net/detail/BIM-378432
Modern Language Association (MLA)
Hammam, Y. A.…[et al.]. Magnetic properties of CoII, CoIII and CoII−III coordinated to a carbosilazane-based polymer. Jordan Journal of Physics Vol. 7, no. 1 (2014), pp.23-34.
https://search.emarefa.net/detail/BIM-378432
American Medical Association (AMA)
Hammam, Y. A.& al-al-Ghunaym, H. M.& Arafa, I. M.& Ziq, Kh. A.& Sad, M. R.. Magnetic properties of CoII, CoIII and CoII−III coordinated to a carbosilazane-based polymer. Jordan Journal of Physics. 2014. Vol. 7, no. 1, pp.23-34.
https://search.emarefa.net/detail/BIM-378432
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 34
Record ID
BIM-378432