Sökning: onr:"swepub:oai:DiVA.org:uu-230914" >
Magnetic and magnet...
Magnetic and magnetocaloric properties of Cu1-xZnxFe2O4 (x=0.6, 0.7, 0.8) ferrites
-
Akhter, Shahida (författare)
-
Paul, D. P. (författare)
-
Hoque, S. M. (författare)
-
visa fler...
-
Hakim, M. A. (författare)
-
- Hudl, Matthias (författare)
- Uppsala universitet,Fasta tillståndets fysik
-
- Mathieu, Roland (författare)
- Uppsala universitet,Fasta tillståndets fysik
-
- Nordblad, Per (författare)
- Uppsala universitet,Fasta tillståndets fysik
-
visa färre...
-
(creator_code:org_t)
- Elsevier BV, 2014
- 2014
- Engelska.
-
Ingår i: Journal of Magnetism and Magnetic Materials. - : Elsevier BV. - 0304-8853 .- 1873-4766. ; 367, s. 75-80
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Ferrites
- Magnetization
- Magnetocaloric effect
- Magnetic entropy
- Teknisk fysik med inriktning mot fasta tillståndets fysik
- Engineering Science with specialization in Solid State Physics
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas