Change in the magnetic moment of a ferromagnetic nanoparticle under polarized current


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Аннотация

The magnetization reversal of a ferromagnetic Fe3O4 nanoparticle with a volume of the order of several thousands of cubic nanometers under the influence of spin-polarized current has been investigated on a high-vacuum scanning tunneling microscope, where one of the electrodes is a magnetized iron wire needle and the second electrode is a ferromagnetic nanoparticle on a graphite substrate. The measured threshold current of magnetization reversal, i.e., the lowest value of the current corresponding to the magnetization reversal, is found to be Ithresh ≈ 9 nA. A change in the magnetization of a nanoparticle is revealed using the giant magnetoresistance effect, i.e., the dependence of the weak polarized current (I < Ithresh) on the relative orientation of the magnetizations of the electrodes.

Авторлар туралы

M. Kozhushner

Semenov Institute of Chemical Physics

Хат алмасуға жауапты Автор.
Email: kozhushner@gmail.com
Ресей, ul. Kosygina 4, Moscow, 119991

A. Gatin

Semenov Institute of Chemical Physics

Email: kozhushner@gmail.com
Ресей, ul. Kosygina 4, Moscow, 119991

M. Grishin

Semenov Institute of Chemical Physics

Email: kozhushner@gmail.com
Ресей, ul. Kosygina 4, Moscow, 119991

B. Shub

Semenov Institute of Chemical Physics

Email: kozhushner@gmail.com
Ресей, ul. Kosygina 4, Moscow, 119991

V. Kim

Moscow State University

Email: kozhushner@gmail.com
Ресей, Moscow, 119991

G. Khomutov

Moscow State University

Email: kozhushner@gmail.com
Ресей, Moscow, 119991

L. Trakhtenberg

Semenov Institute of Chemical Physics

Email: kozhushner@gmail.com
Ресей, ul. Kosygina 4, Moscow, 119991

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