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- Akhter, Shahida (author)
Magnetic and magnetocaloric properties of Cu1-xZnxFe2O4 (x=0.6, 0.7, 0.8) ferrites
- Article/chapterEnglish2014
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- Elsevier BV,2014
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- LIBRIS-ID:oai:DiVA.org:uu-230914
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-230914URI
- https://doi.org/10.1016/j.jmmm.2014.04.070DOI
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- Language:English
- Summary in:English
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- The effect of Zn substitution on the magnetic and magnetocaloric properties of Cu1-xZnxFe2O4 (x=0.6, 0.7, 0.8) ferrites over a wide temperature range has been investigated. The polycrystalline samples were synthesized using the solid-state reaction at sintering temperature 1050 degrees C (1323 K) for 2 h and has been characterized by SQUID magnetometry. Magnetization versus temperature showed that all samples exhibit a paramagnetic to ferromagnetic transition with decreasing temperature. The Curie temperature T-c is found to decrease from 373 K for x=0.6 to 140 K for x=0.8 as well as the saturation magnetization Ms which shifts from 100 to 44 emu/gm. The magnetocaloric effect was obtained by measuring a family of M-I1 curves at set temperature intervals and calculating the entropy change, LIS for this system using the Maxwell relation. The AS of all samples increased with increasing applied field and showed a maximum around their respective 'Fe. The entropy change (Delta S) decreased with increasing Zn content, whereas the relative cooling power (RCP) slightly increased. The large RCP and Delta S found in Zn substitution Cu-Zn ferrites will be interesting for magnetic refrigeration near room temperature.
Subject headings and genre
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- Ferrites
- Magnetization
- Magnetocaloric effect
- Magnetic entropy
- Teknisk fysik med inriktning mot fasta tillståndets fysik
- Engineering Science with specialization in Solid State Physics
Added entries (persons, corporate bodies, meetings, titles ...)
- Paul, D. P. (author)
- Hoque, S. M. (author)
- Hakim, M. A. (author)
- Hudl, MatthiasUppsala universitet,Fasta tillståndets fysik(Swepub:uu)mathu701 (author)
- Mathieu, RolandUppsala universitet,Fasta tillståndets fysik(Swepub:uu)rma26208 (author)
- Nordblad, PerUppsala universitet,Fasta tillståndets fysik(Swepub:uu)pno26208 (author)
- Uppsala universitetFasta tillståndets fysik (creator_code:org_t)
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- In:Journal of Magnetism and Magnetic Materials: Elsevier BV367, s. 75-800304-88531873-4766
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