|
This article is cited in 4 scientific papers (total in 4 papers)
Magnetism
Change in the magnetic moment of a ferromagnetic nanoparticle under polarized current
M. A. Kozhushnera, A. K. Gatina, M. V. Grishina, B. R. Shuba, V. P. Kimb, G. B. Khomutovb, L. I. Trakhtenberga a N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow
b Lomonosov Moscow State University
Abstract:
The magnetization reversal of a ferromagnetic Fe$_{3}$O$_{4}$ 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 $I_{\operatorname{tresh}}\approx$ 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 $(I<I_{\operatorname{tresh}})$ on the relative orientation of the magnetizations of the electrodes.
Keywords:
Iron Oxide Nanoparticle, Magnetization Reversal, Tunneling Current, Highly Orient Pyrolytic Graphite, Graphite Substrate.
Received: 22.06.2015
Citation:
M. A. Kozhushner, A. K. Gatin, M. V. Grishin, B. R. Shub, V. P. Kim, G. B. Khomutov, L. I. Trakhtenberg, “Change in the magnetic moment of a ferromagnetic nanoparticle under polarized current”, Fizika Tverdogo Tela, 58:2 (2016), 259–265; Phys. Solid State, 58:2 (2016), 266–272
Linking options:
https://www.mathnet.ru/eng/ftt10072 https://www.mathnet.ru/eng/ftt/v58/i2/p259
|
Statistics & downloads: |
Abstract page: | 26 | Full-text PDF : | 13 |
|