Change in the magnetic moment of a ferromagnetic nanoparticle under polarized current
- Authors: Kozhushner M.A.1, Gatin A.K.1, Grishin M.V.1, Shub B.R.1, Kim V.P.2, Khomutov G.B.2, Trakhtenberg L.I.1
- 
							Affiliations: 
							- Semenov Institute of Chemical Physics
- Moscow State University
 
- Issue: Vol 58, No 2 (2016)
- Pages: 266-272
- Section: Magnetism
- URL: https://journal-vniispk.ru/1063-7834/article/view/196920
- DOI: https://doi.org/10.1134/S1063783416020177
- ID: 196920
Cite item
Abstract
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.
About the authors
M. A. Kozhushner
Semenov Institute of Chemical Physics
							Author for correspondence.
							Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							ul. Kosygina 4, Moscow, 119991						
A. K. Gatin
Semenov Institute of Chemical Physics
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							ul. Kosygina 4, Moscow, 119991						
M. V. Grishin
Semenov Institute of Chemical Physics
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							ul. Kosygina 4, Moscow, 119991						
B. R. Shub
Semenov Institute of Chemical Physics
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							ul. Kosygina 4, Moscow, 119991						
V. P. Kim
Moscow State University
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							Moscow, 119991						
G. B. Khomutov
Moscow State University
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							Moscow, 119991						
L. I. Trakhtenberg
Semenov Institute of Chemical Physics
														Email: kozhushner@gmail.com
				                					                																			                												                	Russian Federation, 							ul. Kosygina 4, Moscow, 119991						
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