Raychaudhuri, P. ; Mitra, C. ; Dorr, K. ; Muller, K. H. ; Kobernik, G. ; Pinto, R. (2002) Magneto-transport properties of La0.7Ca0.3MnO3/SrTiO3/La0.7Ce0.3MnO3 tunnel junction Pramana, 58 (5-6). pp. 1179-1182. ISSN 0304-4289
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Official URL: http://www.ias.ac.in/describe/article/pram/058/05-...
Related URL: http://dx.doi.org/10.1007/s12043-002-0236-8
Abstract
Hole-doped rare-earth manganite La0.7Ca0.3MnO3 and the electron-doped manganite La0.7Ce0.3MnO3 both show a metal-insulator transition around 250 K associated with a ferromagnetic transition and colossal magnetoresistance. In an earlier publication we have reported the rectifying characteristic of La0.7Ca0.3MnO3/SrTiO3/La0.7Ce0.3MnO3 tunnel junction at room temperature, showing that it is possible to fabricate a diode out of the polaronic insulator regime of doped manganites. Here we report the magneto-transport properties of such a tunnel junction above and below the metal-insulator transition. We show, from the large positive magnetoresistance of the tunnel junction at low temperature, that La0.7Ce0.3MnO3 could be a minority spin carrier ferromagnet. The implication of this observation is discussed.
Item Type: | Article |
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Source: | Copyright of this article belongs to Indian Academy of Sciences. |
Keywords: | La0.7Ce0.3MnO3/SrTiO3/La0.7Ce0.3MnO3 Tunnel Junction; Magneto-Transport Properties; Magnetoresistance |
ID Code: | 105281 |
Deposited On: | 25 Dec 2017 12:22 |
Last Modified: | 25 Dec 2017 12:22 |
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