| Autor: |
Karmakar, S. K., Giri, S., Majumdar, S. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 2015, Vol. 117 Issue 19, p1-4, 4p, 3 Graphs |
| Abstrakt: |
We report the observation of large low temperature magnetocaloric effect and magnetoresistance in the rare-earth based intermetallic compound HoCu2. The compound undergoes an antiferromagnetic type ordering below about TN = 10.5 K, which is second order in nature. The magnetocaloric effect in terms of entropy change under the application of 50 kOe of field is found to have a maximum value of --19.3 Jkg--1K--1 peaking around TN, and an appreciable value of relative cooling power of 268 Jkg--1 was associated with it. The sample also shows giant negative magnetoresistance with its value as high as --36.5% around TN for 50 kOe of field. Field induced second order metamagnetic transition is found to be responsible for the observed magnetocaloric and magnetoresistance behaviors in the sample. The sample is devoid of any thermal or field hysteresis by virtue of the second order nature of the transitions, which enables us to exploit large reversible magnetic cooling at cryogenic temperatures. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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