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.

Substrate-Deposition-Teiimperatijre Dependence of Perpendicular Magnetic Anisotropy in (Fe/Pt) Compositionally-Modulated Films

1991 ◽  
Vol 232 ◽  
Author(s):  
S. Iwata ◽  
S. S. P. Parkin ◽  
H. Nuri ◽  
T. Suzuki
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Saturation Magnetization ◽  
Systematic Study ◽  
Deposition Temperature ◽  
Major Part ◽  
Perpendicular Magnetic Anisotropy ◽  
Perpendicular Anisotropy ◽  
Elastic Effect

ABSTRACTA systematic study on magnetic properties of (Fc/Pt) compositionally-modulated films as a function of substrate-deposition-temperature has been carried out. For films with (2.5ÅFe/18ÅPt)×40, the intrinsic perpendicular magnetic anisotropy Ku is found to increase with decreasing temperature for all the sarmples deposited at temperatures from -114 °C to 220°C during deposition. The higher the substrate-deposition-temperature, the larger the Ku values become. This result implies a possible contribution from the magne to-elastic effect to the total anisotropy. However, a major part responsible for the perpendicular anisotropy may be found in other mechanisms. The saturation magnetization is found to exceed the value for pure Fe at temperatures lower than 180K.

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.

In-Plane Anisotropy In CoCr(Ta,Pt)/Cr Films Deposited onto Substrates with Controlled Topography

1998 ◽  
Vol 517 ◽  
Author(s):  
D.J. Twisselmann ◽  
B.T. Adekor ◽  
M. Farhoud ◽  
Henry I. Smith ◽  
P.C. Dorsey ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Bilayer Films ◽  
Interferometric Lithography ◽  
Plane Anisotropy ◽  
Silica Substrates

AbstractIn-plane magnetic anisotropy can be induced in Cr-underlayer/Co-alloy thin films by grooves or scratches in the substrate. To quantify this effect, silica substrates have been prepared with large areas of submicron grooves using interferometric lithography. The growth of Cr films and Cr/Co-alloy bilayer films on these substrates has been investigated, and in-plane magnetic anisotropy has been observed.

Field-Free switching of perpendicular magnetization through spin-orbit torque in FePt/[TiN/NiFe]5 multilayers

Nanoscale ◽  
2021 ◽  
Author(s):  
Chao Sun ◽  
Yiyi Jiao ◽  
Chao Zuo ◽  
Xin Hu ◽  
Ying Tao ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Materials ◽  
Spin Orbit ◽  
Perpendicular Anisotropy ◽  
Perpendicular Magnetization ◽  
Magnetic Switching ◽  
Thermal Stability Of

In order to maintain thermal stability of SOT devices with nanoscale size, it is desirable to achieve current induced magnetic switching in magnetic materials with high perpendicular anisotropy. In the...

Study of Perpendicular Magnetic Anisotropy in Co/Au Multilayer Probed by Magnetic Compton Profile

2013 ◽  
Vol 596 ◽  
pp. 8-14 ◽  
Author(s):  
Kosuke Suzuki ◽  
Masaki Hayata ◽  
Katsuhiko Minegishi ◽  
Ryosuke Kondoh ◽  
Tadashi Kato ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Cluster Model ◽  
Perpendicular Magnetic Anisotropy ◽  
Volume Ratio ◽  
Main Role ◽  
Compton Profile ◽  
Perpendicular Anisotropy ◽  
Model Calculations ◽  
Secondary Role

Magnetic Compton profiles (MCPs) of Co/Au multilayers have been measured and analyzed by DV-Xαcluster model calculations from a viewpoint of perpendicular magnetic anisotropy (PMA). The PMA and the MCPs are discussed for the presently obtained results for Co/Au, along with the previously obtained results for Co/Pd and Co/Pt. A Co/Au multilayer shows a weak PMA which is caused by |m|=1 states of Co 3d electrons at a smooth Co/Au interface. The increase of the interface-to-volume ratio plays the main role in determining the perpendicular anisotropy in Co/Au multilayers. The strain of a Co layer can have a secondary role in determining the magnetic anisotropy in Co/Au multilayers, although the strain dominates PMA in the case of Co/Pd and Co/Pt multilayers.

Static Torsion of a Magnetostrictive Bimorph with In-Plane Anisotropy

2009 ◽  
Vol 60-61 ◽  
pp. 410-415
Author(s):  
Bai Narsu ◽  
Guo Hong Yun
Keyword(s):  
Free Energy ◽  
External Field ◽  
Magnetic Anisotropy ◽  
Cantilever Beam ◽  
Experimental Result ◽  
Minimal Free Energy ◽  
Plane Anisotropy ◽  
Flexion Response ◽  
Twisting Deformation ◽  
Static Torsion

A model for the bending and twisting deformation of the giant magnetostrictive cantilever is established in the framework of the principle of minimal free energy and four-parameter bending regime. The angular and magnitude dependence of the torsion and flexion response on the external field was discussed for cantilever beam. The torsion behavior of the cantilever is very sensitive to the external field and shows a hysteresis. Furthermore, the torsion hysteresis of the cantilever calculated by our model qualitatively agrees with recent experimental result, which suggests that our model is effective in describing the cantilever system with magnetic anisotropy.

Investigation of induced parallel magnetic anisotropy at low deposition temperature in Ba-hexaferrites thin films

2012 ◽  
Vol 324 (5) ◽  
pp. 711-716 ◽  
Author(s):  
Safia Anjum ◽  
M. Shahid Rafique ◽  
M. Khaleeq-ur-Rahman ◽  
K. Siraj ◽  
Arslan Usman ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Deposition Temperature ◽  
Low Deposition Temperature

Stabilization of perpendicular magnetic anisotropy in CeO2 films deposited on Co/Pt multilayers

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 56785-56789 ◽  
Author(s):  
Nicholas Figueiredo-Prestes ◽  
Juliana Zarpellon ◽  
Hugo F. Jurca ◽  
Vilmar Fernandes ◽  
José Varalda ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Multilayered Films ◽  
Perpendicular Magnetization ◽  
Ceo2 Films

We report the stabilization of perpendicular magnetization, and anisotropy, in transparent CeO2 thin films integrated onto Co/Pt multilayered films.

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