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Spin-polarized current effects in disordered La0.7Ba0.3MnO3 half-metal thin films (Articolo in rivista)
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- Spin-polarized current effects in disordered La0.7Ba0.3MnO3 half-metal thin films (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1088/0022-3727/43/24/245001 (literal)
- Alternative label
Carlo Barone; Carmela Aruta; Alice Galdi; Pasquale Orgiani; Orlando Quaranta; Luigi Maritato; Sergio Pagano (2010)
Spin-polarized current effects in disordered La0.7Ba0.3MnO3 half-metal thin films
in Journal of physics. D, Applied physics (Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Carlo Barone; Carmela Aruta; Alice Galdi; Pasquale Orgiani; Orlando Quaranta; Luigi Maritato; Sergio Pagano (literal)
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- http://iopscience.iop.org/0022-3727/43/24/245001 (literal)
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- CNR-SPIN Salerno and Dipartimento di Matematica e Informatica, Universit`a di Salerno, Fisciano (SA), Italy; CNR-SPIN Salerno and Dipartimento di Fisica 'E.R. Caianiello', Universit`a di Salerno, Fisciano (SA),
Italy; NEST CNR-INFM and Scuola Normale Superiore, I-56126 Pisa, Italy (literal)
- Titolo
- Spin-polarized current effects in disordered La0.7Ba0.3MnO3 half-metal thin films (literal)
- Abstract
- We have investigated by means of noise spectroscopy the transport properties of half-metal La0.7Ba0.3MnO3 (LBMO) thin films deposited on MgO substrates. A reduced metal-insulator transition temperature and a peculiar noise behaviour are observed in the films grown on MgO substrates, when compared with similar films grown on SrTiO3 substrates. In particular, a large increase in noise is observed below the metal-insulator transition temperature, associated with a current induced reduction in the excess noise level. This finding is explained in terms of the spin torque effect between regions with depressed Curie temperatures among the ferromagnetic metallic domains. The proposed theoretical model, taking into account the half-metal character of manganites, describes well the experimental data. (literal)
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