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Title: Current-induced magnetoresistance avalanche in Nd0.5 Ca0.5 Mn0.95 Ni0.05 O3
Authors: Rebello, A.
Mahendiran, R. 
Keywords: A. Manganites
C. Nonvolatile memory
D. Electroresistance
D. Magnetoresistance
Issue Date: May-2010
Citation: Rebello, A., Mahendiran, R. (2010-05). Current-induced magnetoresistance avalanche in Nd0.5 Ca0.5 Mn0.95 Ni0.05 O3. Solid State Communications 150 (19-20) : 961-965. ScholarBank@NUS Repository.
Abstract: We show that magnetic field (H) dependence of resistivity (ρ) in Nd0.5Ca0.5Mn0.95Ni0.05O3 shows unusual features with increasing amplitude of the dc current (I) in the sample. While ρ (H) at T = 40 K decreases smoothly with increasing H and exhibits irreversibility with field cycling for current amplitudes less than 1 mA, an avalanche like decrease occurs at a critical value of H for I > 5 mA. The critical field increases with increasing amplitude of the dc current and the ρ (H) exhibits a reversible hysteresis in the complete field cycle at higher dc current strengths. It is shown that the avalanche in ρ is accompanied by an abrupt decrease in the temperature of the sample (Δ T = 47 K) which underscores the importance of magnetothermal coupling in the current-induced magnetoresistance avalanche. © 2010 Elsevier Ltd. All rights reserved.
Source Title: Solid State Communications
ISSN: 00381098
DOI: 10.1016/j.ssc.2010.02.018
Appears in Collections:Staff Publications

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