Effects of Ferromagnetic Capping Layers on the Perpendicular Anisotropy of Ni/Cu(001) Films.

1994 ◽  
Vol 375 ◽  
Author(s):  
W. L. O'Brien ◽  
B. P. Tonner
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Magnetic Circular Dichroism ◽  
Hysteresis Loops ◽  
Perpendicular Magnetic Anisotropy ◽  
Perpendicular Anisotropy ◽  
Magnetic Orientation ◽  
Capping Layer ◽  
X Ray ◽  
Perpendicular Magnetization

The effects of ferromagnetic capping layers on the perpendicular magnetic anisotropy of Ni/Cu(001) have been studied. X-ray magnetic circular dichroism was used to obtain element specific magnetic information, including hysteresis loops for both in-plane and perpendicular magnetization. A 15 ML Ni/Cu(001) film maintains its perpendicular magnetic orientation after the addition of a 2.5 ML Fe capping layer. The Fe capping layer reduces the area of the Ni hysteresis loop by a factor of 2.0. A 2.0 ML capping layer of Co on 15 ML Ni/Cu(001) switches the easy axis of magnetization from perpendicular to in-plane.

Investigation of perpendicular magnetic anisotropy of CoFeB by x-ray magnetic circular dichroism

2012 ◽  
Vol 100 (17) ◽  
pp. 172414 ◽  
Author(s):  
W. C. Tsai ◽  
S. C. Liao ◽  
H. C. Hou ◽  
C. T. Yen ◽  
Y. H. Wang ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Magnetic Anisotropy ◽  
Magnetic Circular Dichroism ◽  
Perpendicular Magnetic Anisotropy ◽  
X Ray ◽  
Circular Dichroïsm

Perpendicular Magnetic Anisotropy in Nanostructured Pseudomorphic Fe(110) Films on W(110)

1997 ◽  
Vol 475 ◽  
Author(s):  
H.J. Elmers ◽  
N. Weber ◽  
K. Wagner ◽  
J. Hauschild ◽  
U. Gradmann
Keyword(s):  
Magnetic Anisotropy ◽  
Exchange Interaction ◽  
Double Layer ◽  
Room Temperature ◽  
Easy Axis ◽  
Perpendicular Magnetic Anisotropy ◽  
Film Plane ◽  
Perpendicular Anisotropy ◽  
Lateral Scale

ABSTRACTPseudomorphic Fe(110) films, deposited on W(110) at room temperature, with a mean thickness of 1.5 monolayers. are composed of double layer islands with a diameter of the order of 10 nm on a monolayer sea. The double layer islands are ferromagnetic (superparamagnetic) below 500 K, the monolayer sea becomes ferromagnetic below 222 K. Magnetic anisotropy is uniaxial in both components. The easy axis is perpendicular to the film plane in the double layer islands and within the film plane (along [110]) in the monolayer sea. The perpendicular anisotropy in the double layer islands apparently is caused by the pseudomorphic strain. The lateral scale for the anisotropy switching roughly coincides with the exchange lengths in both media. The strength of the exchange interaction between double layer islands rapidly increases when the monolayer sea becomes ferromagnetic.

Magnetic anisotropic properties of Pd/Co/Pd trilayer films studied by X-ray absorption spectroscopy and magnetic circular dichroism

RSC Advances ◽  
2015 ◽  
Vol 5 (25) ◽  
pp. 19014-19019 ◽  
Author(s):  
K. Saravanan ◽  
C.-H. Kao ◽  
Y.-C. Shao ◽  
Y.-F. Wang ◽  
B.-Y. Wang ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Electronic Structures ◽  
Magnetic Circular Dichroism ◽  
Magnetic Moments ◽  
Perpendicular Magnetic Anisotropy ◽  
Effect Of Temperature ◽  
Alloy Formation ◽  
X Ray ◽  
The Relationship ◽  
X Ray Absorption

Strong perpendicular magnetic anisotropy (PMA) is observed in annealed Pd/Co/Pd trilayer film. The effect of temperature on alloy formation, the relationship among the atomic/electronic structures, magnetic moments and PMA has been studied.

Effect of Orientation and Microstructure on the Magnetic Anisotropy of Co/Pd Multilayers

1989 ◽  
Vol 151 ◽  
Author(s):  
Frits J. A. den Broeder ◽  
Dick Kuiper ◽  
Willem Hoving
Keyword(s):  
Magnetic Anisotropy ◽  
Deposition Temperature ◽  
Structural Deformation ◽  
Perpendicular Anisotropy ◽  
Modulation Period ◽  
Perpendicular Magnetization ◽  
Plane Anisotropy ◽  
Interface Anisotropy

ABSTRACTCo/Pd multilayers containing one to eight atomic layers of cobalt and ten atomic layers of palladium per modulation period were prepared in two orienotarteiottnoss, [111]fcc and [001]fcc. The [111] films were polycrystalline, the [001] films were epitaxial.In this paper we compare the magnetic anisotropy of both types of films, which can be described by an interface anisotropy contribution favouring perpendicular magnetization and a volume contribution favouring in-plane magnetization. Depending on the deposition temperature, a perpendicular anisotropy for [111] films is found for up to about six atomic layers of Co. The [001] films however, show perpendicular anisotropy only for Co monolayers or Co bilayers. The large difference between the anisotropies in the two orientations is mainly caused by a strong in-plane anisotropy volume term which exists for [001] films, and which is attributed to the structural deformation of the Co layers from cubic to tetragonal. For both orientations a higher deposition temperature is found to lead to an increase of the interface anisotropy due to smoothing of the layers.

Magnetic Anisotropy in Electrodeposited CO Films and spin-valves on Gaas Substrates

1999 ◽  
Vol 562 ◽  
Author(s):  
K. Attenborough ◽  
M. Cerisier ◽  
H. Boeve ◽  
J. De Boeck ◽  
G. Borghs ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Buffer Layer ◽  
Structural Properties ◽  
Easy Axis ◽  
Spin Valve ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cu Films ◽  
Gaas Substrates ◽  
Unique Spin

ABSTRACTWe have studied the magnetic and structural properties of thin electrodeposited Co and Cu layers grown directly onto (100) n-GaAs and have investigated the influence of a buffer layer. A dominant fourfold anisotropy with a uniaxial contribution is observed in 10 nm Co electrodeposited films on GaAs. An easy axis is observed in the [001] GaAs direction with two hard axes of differing coercivities parallel to the [011] and [011] directions. For thicker films the easy axes in the [001] direction becomes less pronounced and the fourfold anisotropy becomes less dominant. Co films of similar thicknesses deposited onto an electrodeposited Cu buffer layer were nearly isotropic. From X-ray diffraction 21 nm Co layers on GaAs were found to be hcp with the c-axis tending to be in the plane of the film. The anisotropy is ascribed to the Co/GaAs interface and is held responsible for the unique spin-valve properties seen recently in electrodeposited Co/Cu films.

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