Exchange Interactions in NiFe/Ta/IrMn Heterostructures under Conditions of Tantalum Deficiency

In the NiFe/Ta/IrMn structures, the contributions of two types of exchange interactions at the NiFe/IrMn interface, partially separated by sections of the nonmagnetic tantalum interlayer, are distinguished. One type of exchange is “contact”—it occurs directly at the NiFe/IrMn interface. Another type...

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Bibliographic Details
Published in:Physics of the solid state 2020-06, Vol.62 (6), p.1033-1038
Main Authors: Morgunov, R. B., Talantsev, A. D., Bakhmet’ev, M. V., Granovskii, N. V.
Format: Article
Language:English
Subjects:
Comparative analysis
Conduction electrons
Exchanging
Ferromagnetism
Heterostructures
Hysteresis loops
Interlayers
Intermetallic compounds
Iron compounds
Magnetism
Nickel compounds
Physics
Physics and Astronomy
Solid State Physics
Tantalum
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Summary:In the NiFe/Ta/IrMn structures, the contributions of two types of exchange interactions at the NiFe/IrMn interface, partially separated by sections of the nonmagnetic tantalum interlayer, are distinguished. One type of exchange is “contact”—it occurs directly at the NiFe/IrMn interface. Another type is “interlayer,” which takes place through the conduction electrons of the tantalum interlayer. A comparison of the temperature dependences of the exchange bias of the hysteresis loops at fixed parameters of the ferromagnetic layers and various effective thicknesses of the nonmagnetic interlayer made it possible to separate the contributions of the above types of exchange interactions and determine their temperature dependences individually. The exchange interaction energies at the NiFe/IrMn and NiFe/Ta/IrMn interfaces were determined.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783420060177