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https://doi.org/10.1016/j.ssc.2010.02.018
| 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. https://doi.org/10.1016/j.ssc.2010.02.018 | 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 | URI: | http://scholarbank.nus.edu.sg/handle/10635/96144 | ISSN: | 00381098 | DOI: | 10.1016/j.ssc.2010.02.018 |
| Appears in Collections: | Staff Publications |
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