Abstract
The structure, electrical and magnetic properties of the Ni47Mn42In11 alloy, in which the temperature of the martensitic transformation is close to room temperature and practically coincides with the Curie temperature of austenite, have been investigated. The martensitic transformation in the Ni47Mn42In11 alloy proceeds with the formation of modulated martensite type 14M. It has been established that the spontaneous transformation from martensite to austenite is accompanied by a decrease in the specific resistance of 45%. In the martensitic transformation induced by a magnetic field of 18 kOe, a negative magnetoresistance is observed, reaching ~ 15%.
Highlights
Ferromagnetic Heusler alloys with martensitic transformation represent a special class of materials in which there is a magnetically controlled shape memory effect, giant magnetostriction, magnetoresistance, magnetocaloric effect and other properties and effects [1,2,3,4,5,6]
This paper presents the results of studies of the structure and properties of the three-component ferromagnetic alloy Ni47Mn42In11, in which the martensitic transformation temperature is close to room temperature and practically coincides with the Curie temperature of austenite [8]
It should be noted that the Curie temperature of austenite in the Ni47Mn42In11 alloy is close to the temperature of the martensite point: TCA ≈ TM
Summary
Ferromagnetic Heusler alloys with martensitic transformation represent a special class of materials in which there is a magnetically controlled shape memory effect, giant magnetostriction, magnetoresistance, magnetocaloric effect and other properties and effects [1,2,3,4,5,6]. The structure, electrical and magnetic properties of the Ni47Mn42In11 alloy, in which the temperature of the martensitic transformation is close to room temperature and practically coincides with the Curie temperature of austenite, have been investigated. In the martensitic transformation induced by a magnetic field of 18 kOe, a negative magnetoresistance is observed, reaching ~ 15%.
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