Please use this identifier to cite or link to this item: https://doi.org/10.1063/1.4773337
DC FieldValue
dc.titleTunable spin reorientation transition and magnetocaloric effect in Sm 0.7-xLaxSr0.3MnO3 series
dc.contributor.authorAparnadevi, M.
dc.contributor.authorMahendiran, R.
dc.date.accessioned2014-10-16T09:47:21Z
dc.date.available2014-10-16T09:47:21Z
dc.date.issued2013-01-07
dc.identifier.citationAparnadevi, M., Mahendiran, R. (2013-01-07). Tunable spin reorientation transition and magnetocaloric effect in Sm 0.7-xLaxSr0.3MnO3 series. Journal of Applied Physics 113 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.4773337
dc.identifier.issn00218979
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/98461
dc.description.abstractWe report electrical resistivity, magnetic, and magnetocaloric properties in Sm0.7-xLaxSr0.3MnO3 series for x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.65, and 0.7. All the compounds show second order paramagnetic to ferromagnetic (FM) transition at T = Tc , which is tunable anywhere between 83 K and 373 K with a proper choice of the doping level (x). The insulating ferromagnet x = 0 transforms to a ferromagnetic metal below Tc for x = 0.1, and the insulator-metal transition temperature shifts up with increasing x. The magnetization (M) exhibits an interesting behavior as a function of temperature and doping level. The field-cooled M(T) of all but x = 0.7 compounds show a cusp at a temperature T* much below Tc. While the Tc increases monotonically with increasing x, T* increases gradually, attains a maximum value (T* = 137 K) for x = 0.6 and decreases rapidly thereafter. It is suggested that the decrease of M(T) below T* is due to ferrimagnetic interaction between Sm(4f) and Mn(3d) sublattices that promotes spin-reorientation transition of the Mn-sublattice. The observed anomalous feature in M(T) does not have impact on the dc resistivity. Magnetic entropy change (ΔSm) was estimated from magnetization isotherms. The sign of ΔSm is found to change from negative above T* to positive below T* indicating the coexistence of normal and inverse magnetocaloric effects. ΔSm is nearly composition independent (-ΔSm = 1.2 ± 0.2 J/Kg K for μ0ΔH = 1 Tesla) and refrigeration capacity lies between 40 and 50 J/kg K for 0.1 ≤ x ≤ 0.6. We show scaling of magnetic entropy change under different magnetic fields and analysis of critical exponents associated with the phase transition in x = 0.6 compound. The tunability of Curie temperature with nearly constant ΔSm value along with high refrigeration capacity makes this series of compounds interesting for magnetic refrigeration over a wide temperature range. © 2013 American Institute of Physics.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1063/1.4773337
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1063/1.4773337
dc.description.sourcetitleJournal of Applied Physics
dc.description.volume113
dc.description.issue1
dc.description.page-
dc.description.codenJAPIA
dc.identifier.isiut000313329000056
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

18
checked on May 10, 2022

WEB OF SCIENCETM
Citations

18
checked on May 10, 2022

Page view(s)

104
checked on May 12, 2022

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.