CUED Publications database

Magnetotransport of La0.5Ba0.5MnO3

Pkaa, M and Drozd, V and Fagnard, JF and Vanderbemden, P and Ausloos, M (2009) Magnetotransport of La0.5Ba0.5MnO3. Journal of Applied Physics, 105. ISSN 0021-8979

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Physical properties of polycrystalline La 0.5 Ba 0.5 MnO 3 are reported from low temperature (10 K) up to above room temperature. An aim has been to obtain microscopic parameters and to search for the characteristic lengths in terms of which one can discuss the interplay between magnetic, electric, and phonon excitations. The structural and magnetotransport measurements reveal a set of relatively high transition temperatures (near 300 K) between ferromagnetic/metallic and paramagnetic/semiconducting phases. It is found, in particular, that the so-called localization length increases from 0.085 to 0.24 nm when the magnetic field varies from 0 to 8 T. Moreover a "special field value" ∼0.03 T is observed in the description of the electrical resistance. It cannot be presently distinguished whether it is the signature of a spin reorientation transition in the canted phase or a mere saturation field for aligning magnetic domains. The relatively high magnetoresistance effect (≃55% at 8 T and 10 K) makes the La 0.5 Ba 0.5 MnO 3 a very interesting material for among others sensor applications. © 2009 American Institute of Physics.

Item Type: Article
Divisions: Div B > Electronics, Power & Energy Conversion
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:19
Last Modified: 11 Jan 2018 02:54