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http://hdl.handle.net/11154/3092
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Title: | STRUCTURAL TRANSITIONS IN A TINIFE SHAPE-MEMORY ALLOY |
Authors: | RIDAURA, R GOMEZ, R ESCUDERO, R RíosJARA, D Jiménez, M Aburto, S Marquina, V Marquina-Fábrega, María Luisa |
Issue Date: | 1994 |
Abstract: | Results for resistance versus temperature, differential scanning calorimetry (DSC), Mossbauer spectroscopy, and magnetic susceptibility measurements in a Ti50Ni47Fe3 sample are presented. The resistance versus temperature curve shows a sharp increase at 245K and then rises slowly until a maximum is attained at almost-equal-to 150K. The DSC curve also exhibits a peak at the former temperature. The room temperature Mossbauer spectrum consists of a single line. As the temperature is lowered to 270K, a small asymmetric quadrupole doublet appears. The isomer shift and quadrupole splitting values of this doublet increase with decreasing temperature until almost constant values are achieved at temperatures almost-equal-to 100K. The magnetic susceptibility curve shows a sharp decrease that begins at 255K and then an unexpected increase at 90K. We relate these observations with a charge density wave-driven premartensitic transition in this system, and with the final martensitic phase. |
URI: | http://hdl.handle.net/11154/3092 |
ISSN: | 1044-5803 |
Appears in Collections: | Física
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