scholarly journals Magnetic Properties and MFM Observation of Co-Cr-Ta and Co-Cr Thin Films with Perpendicular Magnetic Anisotropy.

1997 ◽  
Vol 10 (1) ◽  
pp. 45-53
Author(s):  
S. ISHIO ◽  
T. OKAMOTO ◽  
H. ABE ◽  
H. SAITO ◽  
K. OUCHI
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy

ELECTRONIC STRUCTURES AND REORIENTATION OF PERPENDICULAR MAGNETIC ANISOTROPY OF Co/Au(111) and Co/Pd(111)

2002 ◽  
Vol 09 (02) ◽  
pp. 865-869
Author(s):  
M. SAWADA ◽  
K. HAYASHI ◽  
A. KAKIZAKI
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Binding Energy ◽  
Film Thickness ◽  
Magnetic Anisotropy ◽  
Photoelectron Spectroscopy ◽  
Electronic Structures ◽  
Perpendicular Magnetic Anisotropy ◽  
Magnetization Direction ◽  
Electronic And Magnetic Properties

We have investigated electronic and magnetic properties of Co thin films epitaxially grown on Au(111) and Pd(111) substrates by spin- and angle-resolved photoelectron spectroscopy. In the Co/Au(111) system, the magnetization direction of Co changes from perpendicular to parallel to the surface at about 6 ML. The origin of the reorientation is qualitatively explained by the increasing contribution of Co 3d orbitals perpendicular to the surface. In the Co/Pd(111) system, the reorientation of the magnetization direction occurs at about 4 ML, the origin of which is explained as being due to the contribution of the upper Λ3 band of Co with increase of film thickness as in the case of the Co/Au(111) system. The stronger hybridization between Co 3d and Pd 4d states in the Co/Pd(111) system causes larger binding energy shifts of the Λ3 states than in the Co/Au(111) system.

scholarly journals Interfacial coupling effect of Cr2O3 on the magnetic properties of Fe72Ga28 thin films

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
I. Hontecillas ◽  
M. Maicas ◽  
J. P. Andrés ◽  
R. Ranchal
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Coupling Effect ◽  
Perpendicular Magnetic Anisotropy ◽  
Interfacial Coupling ◽  
Bias Effect ◽  
Exchange Bias Effect ◽  
Sample Plane ◽  
Out Of Plane

AbstractHere it is investigated the effect of the antiferromagnet Cr2O3 on the magnetic properties of ferromagnetic Fe72Ga28 thin films. Sputtered Fe72Ga28 layers have their magnetization in the sample plane with a magnetic fluctuation that gives rise to magnetic ripple. In order to turn its magnetization into the out of plane (OOP) direction, it has been magnetically coupled with Cr2O3 that has magnetic moments along the c-axis, that is the perpendicular direction when properly aligned. Cr2O3 has been obtained from Cr oxidation, whereas Fe72Ga28 has been deposited on top of it by sputtering in the ballistic regime. Although a uniaxial in-plane magnetic anisotropy is expected for Fe72Ga28 thickness above 100 nm, the interfacial coupling with Cr2O3 prevents this anisotropy. The formation of stripe domains in Fe72Ga28 above a critical thickness reveals the enhancement of the out of plane component of the Fe72Ga28 magnetization with respect to uncoupled layers. Due to the interface coupling, the Fe72Ga28 magnetization turns into the out-of-plane direction as its thickness is gradually reduced, and a perpendicular magnetic anisotropy of 3·106 erg·cm−3 is inferred from experimental results. Eventually, the coupling between Cr2O3 and Fe72Ga28 promotes an exchange-bias effect that has been well fitted by means of the random field model.

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