Magnetic proximity effect and shell-ferromagnetism in metastable Ni50Mn45Ga5
| Autor: | Michael Farle, Mehmet Acet, Thorsten Krenke, Franziska Scheibel, Aslı Çakır |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Annealing (metallurgy) Metallurgy Alloy General Physics and Astronomy 02 engineering and technology engineering.material Physik (inkl. Astronomie) 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Condensed Matter::Materials Science Tetragonal crystal system Ferromagnetism Magnetic shape-memory alloy Remanence Metastability 0103 physical sciences engineering 0210 nano-technology |
| Popis: | The present study on magnetic and structural properties of Ni50Mn45Ga5 confirms that structural metastability is an inherent property of Ni50Mn50–xXx Heusler alloys with X as In, Ga, and Sn. The ternary alloy transforms during temper-annealing into a dual-phase composite alloy. The two phases are identified to be cubic L21, Ni50Mn25Ga25, and tetragonal L10 Ni50Mn50. Depending on the annealing temperature, the magnetic-proximity effect giving rise to shell-ferromagnetism has been observed when annealing is carried out under an external magnetic field. The upper and lower remanence values MR+ and MR− have the same sign even at high temperatures. Such alloys can be promising candidates for heat- and magnetic-field-resistant magnetic recording media. |
| Databáze: | OpenAIRE |
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