dc.contributor.author |
Arun, B |
|
dc.contributor.author |
Akshay, V R |
|
dc.contributor.author |
Mutta, G R |
|
dc.contributor.author |
Venkatesh, Ch |
|
dc.contributor.author |
Vasundhara, M |
|
dc.date.accessioned |
2018-06-22T09:30:26Z |
|
dc.date.available |
2018-06-22T09:30:26Z |
|
dc.date.issued |
2017-10 |
|
dc.identifier.citation |
Materials Research Bulletin, 94:537-543 |
en_US |
dc.identifier.uri |
http://dx.doi.org/10.1016/j.materresbull.2017.07.006 |
|
dc.identifier.uri |
http://10.10.100.66:8080/xmlui/handle/123456789/3145 |
|
dc.description.abstract |
An inexpensive perovskite type (REMIX)0.67Sr0.33MnO3 compound is synthesized via solid state method
using mixed rare earth oxide precursor derived from monazite sand. Rietveld refinement of X-ray powder
diffraction patterns confirms the compound is a mixture of rare earth manganites which is the major phase and CeO2 as the secondary phase. The compound shows a second order ferromagnetic to paramagnetic transition near room temperature and exhibits a magnetic entropy change (-DSM) of 3.28 J kg 1 K 1 with a relative cooling power (RCP) of 120 J kg 1 and an adiabatic temperature change (DTad) of 2.11 K at 310 K under 50 kOe magnetic field. The Debye temperature of the compound is found to be 543 K and room temperature thermal conductivity is 4.26 W m 1 K 1. The temperature variation of electrical resistivity shows a metal to insulator transition around 180 K, which gets shifted towards higher temperature upon the application of magnetic field. The compound shows a large value of DSM and this work makes an endeavor to develop low–cost materials for the magnetic refrigeration applications near the room temperature. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Elsevier |
en_US |
dc.subject |
Perovskite |
en_US |
dc.subject |
magnetocaloric |
en_US |
dc.subject |
rare earth oxides |
en_US |
dc.title |
Mixed Rare Earth Oxides Derived from Monazite Sand as an Inexpensive Precursor Material for Room Temperature Magnetic Refrigeration Applications |
en_US |
dc.type |
Article |
en_US |