|Large, Temperature-Tunable Low-Field Magnetoresistance in La0.7Sr0.3MnO3:NiO Nanocomposite Films Modulated by Microstructures|
|X. K. Ning; Z. J. Wang; Z. D. Zhang
|Source Publication||Advanced Functional Materials
|Abstract||Magnetic properties and low-field magnetoresistance (LFMR) in La0.7Sr0.3MnO3 (LSMO):NiO nanocomposite films grown on SrTiO3 (001) substrates, which are shown to be tunable with different microstructures, are investigated. The LSMO: NiO nanocomposite films with NiO volume ratio of 50% have a checkerboard-like structure and show a large LFMR in a temperature range from 200 to 300 K (approximate to 17% at 250 K with a magnetic field of 1 T). As the NiO volume ratio is increased to 70%, a nano-columnar structure formed in the films. Their LFMR is significantly enhanced at a wide temperature range of 10-210 K. The highest value of LFMR with 41% is achieved at 10 K in a magnetic field of 1 T. The enhanced LFMR can be considered to result from the electron scattering at the ferromagnetic LSMO/NiO interfaces and magnetic tunnel junctions (MTJs) of LSMO/NiO/LSMO at the nanometer scale. These results demonstrate that large and tunable LFMR from low temperature to room temperature can be realized by controlling the microstructures in the epitaxial La0.7Sr0.3MnO3:NiO nano composite thin films, which will be expected to be applied in the devices using for a wide temperature range.|
; wang, zhanjie
; zhang, zhidong] chinese acad sci, imr, shenyang natl lab mat sci, shenyang 110016, peoples r china.
; ning, xk (reprint author), chinese acad sci, imr, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.
X. K. Ning,Z. J. Wang,Z. D. Zhang. Large, Temperature-Tunable Low-Field Magnetoresistance in La0.7Sr0.3MnO3:NiO Nanocomposite Films Modulated by Microstructures[J]. Advanced Functional Materials,2014,24(34):5393-5401.
X. K. Ning,Z. J. Wang,&Z. D. Zhang.(2014).Large, Temperature-Tunable Low-Field Magnetoresistance in La0.7Sr0.3MnO3:NiO Nanocomposite Films Modulated by Microstructures.Advanced Functional Materials,24(34),5393-5401.
X. K. Ning,et al."Large, Temperature-Tunable Low-Field Magnetoresistance in La0.7Sr0.3MnO3:NiO Nanocomposite Films Modulated by Microstructures".Advanced Functional Materials 24.34(2014):5393-5401.
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