| |
 |
UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 9:43 |
 |
|
|
|
Conference: Bucharest University Faculty of Physics 2011 Meeting
Section: Educational Physics
Title:
Experimental Configuration for the Simultaneous Study of Magnetization Reversal and Giant Magnetoresitance Effects in Exchange Coupled Spin Valve Structures
Authors:
G.Schinteie(1), Cristina Kuncser(2), A.Kuncser(2), Florentina Iofciu(2), I.Jepu(3) and S.Antohe(2)
Affiliation:
(1) National Institute for Physics of Materials, P.O. Box MG 7, 077125, Bucharest-Magurele, Romania
(2) University of Bucharest, Faculty of Physics, Atomistilor Street 405, P.O. Box MG 11, 077125, Bucharest-Magurele, Romania
(3) National Institute for Lasers, Plasma and Radiation Physics, P.O. Box MG 36,0 77125, Bucharest-Magurele, Romania
E-mail
ckuncser@yahoo.com
Keywords:
spin valves, giant magnetoresistance, MOKE
Abstract:
The active component of a modern spin valve structure is composed of two nanometer thick ferromagnetic layers interfacing a conductive layer. One of the ferromagnetic layers is exchange coupled to an antiferromagnetic one in order to present a different magnetization reversal as compared to the free ferromagnetic layer. Hence, according to a giant magnetoresitive effect, the conductivity of the component can be tuned via a magnetic field inducing different magnetic configurations of the two ferromagnetic layers interfacing the conductive one. It is not a trivial task to prove experimentally the direct correlation between the conductivity of the system and the magnetic configuration of the sandwiching layers. This paper reports on a designed experimental configuration for the simultaneous study of magnetization reversal and giant magnetoresistance effects in exchange coupled spin valves. The mentioned configuration is based on a magneto-optic Kerr effect (MOKE) device, which sample holder was adapted for allowing the simultaneous measurement of the resistance by a simple two contacts method. The multilayer structures were prepared by theromo-ionic vacuum arc methods and initially characterized by X-ray diffractometry and energy dispersive X-ray spectroscopy. According to the performed experiments, it has been clearly proven the presence of resistance maxima over ranges of applied fields inducing antiparallel magnetizations in the two ferromagnetic layers.
|
|
|
|