In:
Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 1141 ( 2016-8), p. 196-203
Abstract:
We report the electrical-transport, magneto-transport, and magnetic properties of the hole doped La 0.7 Ca 0.3 MnO 3 (LCMO) and La 0.7 Ca 0.24 Sr 0.06 MnO 3 (LCSMO) single crystals, prepared using floating zone technique. The resistivity data shows the metal to insulator transition (T MI ) occurs at 211 K and 290 K for LCMO and LCSMO single crystals respectively. The electrical transport mechanisms of these crystals are investigated by using different theoretical models, for temperatures below and above T MI . The magnetization measurements show that these single crystals exhibit ferromagnetic to paramagnetic transition temperature (T C ) at 208 K for LCMO and 273 K for LCSMO single crystals. From device application point of view, both samples show the maximum MR of 98% for LCMO and 80% for LCSMO at 8 T applied magnetic field, while for bolometer IR detectors application point of view the temperature coefficient of resistance (TCR) are found to ~17% K -1 and 28% K -1 for LCMO and LCSMO respectively.
Type of Medium:
Online Resource
ISSN:
1662-8985
DOI:
10.4028/www.scientific.net/AMR.1141
DOI:
10.4028/www.scientific.net/AMR.1141.196
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2016
detail.hit.zdb_id:
2265002-7
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