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.

The Perpendicular Magnetic Anisotropy and Structure of Sputtered Ag/Co, Pd/Co, and AgPd/Co Multilayered Films

1991 ◽  
Vol 231 ◽  
Author(s):  
Akira Yamaguchi ◽  
We-Hyo Soe ◽  
Ryoichi Yamamoto ◽  
Masonobu Kobayashi
Keyword(s):  
Magnetic Anisotropy ◽  
Room Temperature ◽  
Perpendicular Magnetic Anisotropy ◽  
Film Plane ◽  
Easy Magnetization Axis ◽  
Easy Magnetization ◽  
Multilayered Films ◽  
Preferred Direction ◽  
Magnetization Axis ◽  
Opposite Tendency

AbstractThe structural and magnetic properties of sputtered Ag/Co, Pd/Co, and AgPd/Co multilayered films were investigated. When substrate temperature during deposition (Ts) was set at room temperature, the easy magnetization axis of the Pd/Co films with Co thickness less than 7Å was normal to the film plane and that of the Ag/Co films was parallel. AgPd/Co multilayered films showed a transition of the preferred direction of magnetic moment from lying in the film plane towards lying along the film normal when increasing the Pd concentration above 81 at%. Moreover, an anomalous reduction of the saturation magnetization was found. The perpendicular magnetic anisotropy of Pd/Co films with low Ts increased with decreasing the thickness of Co layer. However, the Pd/Co films with high Ts showed opposite tendency.

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.

Prediction of room-temperature ferromagnetism and large perpendicular magnetic anisotropy in a planar hypercoordinate FeB3 monolayer

2021 ◽  
Vol 6 (1) ◽  
pp. 43-48
Author(s):  
Cheng Tang ◽  
Kostya (Ken) Ostrikov ◽  
Stefano Sanvito ◽  
Aijun Du
Keyword(s):  
Transition Temperature ◽  
Magnetic Anisotropy ◽  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Perpendicular Magnetic Anisotropy ◽  
High Transition Temperature ◽  
Perpendicular Anisotropy ◽  
Highly Efficient ◽  
High Transition

Predicted ferromagnetic FeB3 monolayer simultaneously possesses the high transition temperature and large perpendicular anisotropy, leading to great potentials in highly efficient spintronic applications.

scholarly journals Strain-induced perpendicular magnetic anisotropy and Gilbert damping of Tm3Fe5O12 thin films

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Oana Ciubotariu ◽  
Anna Semisalova ◽  
Kilian Lenz ◽  
Manfred Albrecht
Keyword(s):  
Film Thickness ◽  
Magnetic Anisotropy ◽  
Tensile Strain ◽  
Easy Axis ◽  
Perpendicular Magnetic Anisotropy ◽  
Gilbert Damping ◽  
Sample Plane ◽  
Iron Garnets ◽  
Out Of Plane ◽  
Magnetic Easy Axis

AbstractIn the attempt of implementing iron garnets with perpendicular magnetic anisotropy (PMA) in spintronics, the attention turned towards strain-grown iron garnets. One candidate is Tm3Fe5O12 (TmIG) which possesses an out-of-plane magnetic easy axis when grown under tensile strain. In this study, the effect of film thickness on the structural and magnetic properties of TmIG films including magnetic anisotropy, saturation magnetization, and Gilbert damping is investigated. TmIG films with thicknesses between 20 and 300 nm are epitaxially grown by pulsed laser deposition on substituted-Gd3Ga5O12(111) substrates. Structural characterization shows that films thinner than 200 nm show in-plane tensile strain, thus exhibiting PMA due to strain-induced magnetoelastic anisotropy. However, with increasing film thickness a relaxation of the unit cell is observed resulting in the rotation of the magnetic easy axis towards the sample plane due to the dominant shape anisotropy. Furthermore, the Gilbert damping parameter is found to be in the range of 0.02 ± 0.005.

scholarly journals Room-temperature perpendicular magnetic anisotropy of Pt/Co/AlOx trilayers on SrTiO3 (001)

AIP Advances ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 105010
Author(s):  
Ye Du ◽  
Shoma Arai ◽  
Shingo Kaneta-Takada ◽  
Le Duc Anh ◽  
Shutaro Karube ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Room Temperature ◽  
Perpendicular Magnetic Anisotropy

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.

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.

Magnetostriction and Microstructure of As-Deposited and Annealed Co Thin Films

2001 ◽  
Vol 674 ◽  
Author(s):  
Winfried Brückner ◽  
Michael Hecker ◽  
Jürgen Thomas ◽  
Detlev Tietjen ◽  
Claus M. Schneider
Keyword(s):  
Thin Films ◽  
Magnetic Fields ◽  
Magnetic Anisotropy ◽  
Grain Growth ◽  
Spontaneous Magnetization ◽  
Perpendicular Magnetic Anisotropy ◽  
Transverse Magnetic ◽  
Film Plane ◽  
Appreciable Change

ABSTRACTThe magnetostriction of as-sputtered and annealed 400 nm thick Co films has been studied in longitudinal and transverse magnetic fields. The appreciable change of the magnetostriction behavior after annealing above 250 °C is correlated to grain growth and to the related change of the texture (from nearly randomly distributed hcp-Co crystallites to a c-axes texture perpendicular to the film plane). The magnetostriction behavior in the annealed samples cannot be explained by a domain magnetization within the film plane. It is assumed that a rotation of the spontaneous magnetization out of the film plane occurs due to the development of a perpendicular magnetic anisotropy.

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