NDLI: Heisenberg-Like Critical Properties and Magnetocaloric Effect in Lead Doped NdMnO$

Content Provider	Springer Nature Link
Author	Ghosh, Nilotpal
Copyright Year	2013
Abstract	Static magnetization for single crystals of Nd$_{0.7}$Pb$_{0.3}$MnO$_{3}$ has been studied around the ferromagnetic-to-paramagnetic transition temperature T $_{ C }$. The results of measurements carried out in the critical range \|(T−T $_{ C }$)/T $_{ C }$\|≤0.1 are reported. The critical exponents β and γ for the thermal behavior of magnetization and susceptibility have been obtained both from the modified Arrott plots and the Kouvel–Fisher method. The exponent δ, independently obtained from the critical isotherm, was found to satisfy the Widom scaling relation δ=γ/β+1. The values of exponents are consistent with those expected for isotropic magnets belonging to the Heisenberg universality class with short-range exchange in three dimensions. The maximum magnetic entropy change is found at around T $_{ C }$. We found a universal scaling behavior in the relative change of magnetic entropy (ΔS $_{ M }$). The rescaled curves of the magnetic entropy change for different applied fields are observed to collapse onto a single curve, which validates the second order nature of the phase transition in Nd$_{0.7}$Pb$_{0.3}$MnO$_{3}$.
Starting Page	1451
Ending Page	1454
Page Count	4
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	26
Issue Number	5
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2013-01-05
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Critical point phenomena Magnetocaloric effect Universal scaling Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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