Magnetoresistance of Fe-Ni invar alloy and Cu trilayer

In this paper, we report the field and temperature dependence of magnetoresistance of trilayer made by sandwitching Cu layer between two Fe-Ni layers. Two trilayer structures have been prepared (i) Fe0.59Ni0.41 (50 nm)/Cu (8 nm)/ Fe0.59Ni0.41 (50 nm) (non invar trilayer) and (ii) Fe0.61Ni0.39 (50 nm...

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Bibliographic Details
Main Authors: Sahoo, Ananya, Mohanta, Maheswari, Parida, S. K., Gupta, Mukul, Reddy, V. R., Rawat, Rajeev, Medicherla, V. R. R.
Format: Conference Proceeding
Language:English
Subjects:
Copper
Ferromagnetism
Ferrous alloys
Iron
Low expansion alloys
Low temperature
Magnetoresistance
Magnetoresistivity
Nickel
Temperature
Temperature dependence
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Summary:In this paper, we report the field and temperature dependence of magnetoresistance of trilayer made by sandwitching Cu layer between two Fe-Ni layers. Two trilayer structures have been prepared (i) Fe0.59Ni0.41 (50 nm)/Cu (8 nm)/ Fe0.59Ni0.41 (50 nm) (non invar trilayer) and (ii) Fe0.61Ni0.39 (50 nm)/Cu (8 nm)/ Fe0.61Ni0.39 (50 nm) (invar trilayer). The magnetoresistance of invar trilayer exhibits anomalous temperature and field dependence. The magnetoresistance changes from positive to negative when the temperature changes from 5K to 100K. Whereas the magnetoresistance of the non invar trilayer resembles the usual ferromagnetic trilayer and remains positive down to low temperatures. The anomalous magnetoresistance in invar trilayer is related to the existence of two magnetic states.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0016678