Current-field diagram of magnetic states of a surface spin valve in a point contact with a single ferromagnetic film

Автор(и)

  • I.K. Yanson B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • O.P. Balkashin B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • V.V. Fisun B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
  • Yu.I. Yanson Kamerlingh Onnes Laboratory, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands
  • Yu.G. Naidyuk B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.4795199

Ключові слова:

point contacts, spin valve, spin transfer torque, magnetic phase diagram.

Анотація

We present a study of the influence of an external magnetic field H and an electric current I on the spin-valve (SV) effect in point contact between a ferromagnetic thin film (F) and a sharp tip of a nonmagnetic metal (N). To explain our observations, we propose a model of a local surface SV which is formed in such a N/F contact. In this model, a ferromagnetic cluster at the N/F interface plays the role of the free layer in this SV. This cluster exhibits a larger coercive field than the bulk of the ferromagnetic film, presumably due to its nanoscale nature. Finally, we construct a magnetic state diagram of the surface SV as a function of I and H.

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Опубліковано

2013-01-15

Як цитувати

(1)
I.K. Yanson, O.P. Balkashin, V.V. Fisun, Yu.I. Yanson, and Yu.G. Naidyuk, Current-field diagram of magnetic states of a surface spin valve in a point contact with a single ferromagnetic film, Low Temp. Phys. 39, (2013) [Fiz. Nizk. Temp. 39, 360-366, (2013)] DOI: https://doi.org/10.1063/1.4795199.

Номер

Том 39 № 3 (2013)

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