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Ferromagnetism and antiferromagnetism in Ni2+x+yMn1−xAl1−y alloys |
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| Authors: | C. Paduani A. Migliavacca J.D. Ardisson S. Soriano |
| Affiliation: | a DF-UFSC, Florianópolis, CEP 88040-900, SC, Brazil b CDTN, Belo Horizonte, CEP 30123-970, MG, Brazil c DQ-ICEX-UFMG, Belo Horizonte, CEP 31270-901, MG, Brazil d IF-UFRJ, Rio de Janeiro, CEP 21945-970, RJ, Brazil |
| Abstract: | The magnetic behavior of Ni2+xMn1−xAl alloys around the stoichiometric 2:1:1 composition was investigated with several experimental techniques. The results of low-temperature magnetization measurements indicate that a competition mechanism between ferromagnetism and antiferromagnetism is expected in off-stoichiometric alloys. Although the Curie temperature is strongly dependent on the composition, the saturation magnetization has an unsystematic variation for deviations from the stoichiometric Ni2MnAl alloy. A reentrant-spin-glass behavior is observed below 50 K. |
| Keywords: | 75.50.Be 75.50.Cc 75.50.-y |
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