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

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

Yanson, I.K. ; Balkashin, O.P. ; Fisun, V.V. ; Yanson, Yu.I. ; Naidyuk, Yu.G.

Тема: К 75-летию со дня рождения И. К. Янсона

Інший ID: PACS: 72.25.–b, 73.40.Jn, 75.75.+a, 85.75.–d

URI: http://dspace.nbuv.gov.ua/handle/123456789/118232

Посилання: Current-field diagram of magnetic states of a surface spin valve in a point contact with a single ferromagnetic film / I.K. Yanson, O.P. Balkashin, V.V. Fisun, Yu.I. Yanson, Yu.G. Naidyuk // Физика низких температур. — 2013. — Т. 39, № 3. — С. 360–366. — Бібліогр.: 24 назв. — англ.

Підтримка: The research was supported in part by the “NANO” program of NAS of Ukraine under Project 26/12-H.

Дата: 2013

Завантажень: 343

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

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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