1. Low field anisotropic colossal magnetoresistance in Sm0.53Sr0.47MnO3 thin films.
- Author
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Srivastava, Manoj K., Singh, M. P., Kaur, Amarjeet, Razavi, F. S., and Singh, H. K.
- Subjects
MAGNETORESISTANCE ,THIN films ,ANISOTROPY ,MAGNETRON sputtering ,SINGLE crystals ,SUBSTRATES (Materials science) ,FERROMAGNETISM ,METAL-insulator transitions - Abstract
Sm0.53Sr0.47MnO3 (SSMO) thin films (thicknesses ∼200 nm) were deposited by on-axis dc magnetron sputtering on the single crystal LSAT (001) substrates. These films are oriented along the out of plane c-direction. The ferromagnetic and insulator-metal transition occurs at TC ∼ 96 and TIM ∼ 91 K, respectively. The magnetization easy axis is observed to lie in the plane of the film while the magnetic hard axis is found to be along the normal to this. The magnetotransport of the SSMO films, which was measured as a function of angle (θ) between the magnetic field (H) and plane of the film, shows colossal anisotropy. Magnetoresistance (MR) decreases drastically as θ increases from 0° (H//easy axis) to 90° (H//hard axis). The out-of-plane anisotropic MR is as high as 88% at H = 3.6 kOe and 78 K. The colossal anisotropy has been explained in terms of the magnetic anisotropies at play and the magnetic domain motion in applied magnetic field. [ABSTRACT FROM AUTHOR] more...
- Published
- 2011
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