Perpendicular Magnetic Anisotropy and Magneto-Optical Properties of Sputtered Re-Tm(CoGd)/Pd Multilayered Films

1996 ◽  
Vol 458 ◽  
Author(s):  
T. Yang ◽  
W. H. Soe ◽  
B. X. Liu ◽  
R. Yamamoto
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Magnetic Layer ◽  
Perpendicular Magnetic Anisotropy ◽  
Film Plane ◽  
Easy Magnetization Axis ◽  
Easy Magnetization ◽  
Kerr Rotation ◽  
Multilayered Films ◽  
Magnetization Axis

ABSTRACTThe magnetic properties of sputtered RE-TM(CoGd)/Pd multilayered films were studied. CoGd layers with high Gd concentration were amorphous. Reducing the Gd concentration, CoGd layers changed from amorphous to crystalline gradually. Like in the crystalline Co/Pd multilayered films, perpendicular magnetic anisotropy(PMA) was observed only for CoGd/Pd multilayered films with thin magnetic layer. It is interesting to note that critical magnetic layer thickness, below which the easy magnetization axis is perpendicular to the film plane, reaches 2.5nm for CoGd/Pd multilayered films with amorphous CoGd layers and is larger than that of Co/Pd multilayered films. Kerr rotation was found decreased with the adding of Gd.

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.

scholarly journals Magnetic Anisotropy Induced by Orbital Occupation States in La0.67Sr0.33MnO3 Film

2021 ◽  
Author(s):  
Huaixiang Wang ◽  
Jinghua Song ◽  
Weipeng Wang ◽  
Yuansha Chen ◽  
Xi Shen ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Film Plane ◽  
Easy Magnetization Axis ◽  
Spin Reorientation ◽  
Easy Magnetization ◽  
Lsmo Film ◽  
Electronic Spin ◽  
Magnetization Axis ◽  
Interfacial States ◽  
Orbital Occupation

Abstract Interface engineering is an effective and feasible method to regulate the magnetic anisotropy of films by altering interfacial states between different films. Using the technique of pulsed laser deposition, we prepared La0.67Sr0.33MnO3 (LSMO) and La0.67Sr0.33MnO3/SrCoO2.5 (LSMO/SCO) films on the (110)-oriented La0.3Sr0.7Al0.65Ta0.35O3 substrates. By covering the SCO film above the LSMO film, we transformed the easy magnetization axis of LSMO from the [001] axis to the [1\(\stackrel{\text{-}}{\text{1}}\)0] axis in the film plane. Based on statistical analyses, we found that the corresponding Mn-Mn ionic distances are different in the two types of LSMO films, causing different distortions of Mn-O octahedron in the LSMO film. In addition, it also induces diverse electronic occupation states in Mn3+ ions. The eg electron of Mn3+ occupies 3z2-r2 and x2-y2 orbitals in the LSMO and LSMO/SCO, respectively. We conclude that the electronic spin reorientation leads to the transformation of the easy magnetization axis in the LSMO films.

ANGULAR DEPENDENCE OF MAGNETIC PROPERTIES IN Co/Pt MULTILAYERS WITH PERPENDICULAR MAGNETIC ANISOTROPY

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2562-2567 ◽  
Author(s):  
W. W. LIN ◽  
H. SANG ◽  
B. YOU ◽  
Z. S. JIANG ◽  
G. XIAO
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Film Plane ◽  
Switching Field ◽  
Easy Magnetization ◽  
Magnetization Direction ◽  
Saturation Field ◽  
Sample Plane

Dependence of magnetic properties on the angles between the applied magnetic field and the normal of the film plane in Co/Pt multilayer with easy magnetization direction perpendicular to the film plane have been studied. The results show that the sample exhibits unusual magnetization behaviors when an external magnetic field applied in different angle to the normal of the sample plane. The remanence decreases and the saturation field increases with increasing the angle, accompanying the magnetization-switching field and the coercivity enhance. These results suggest that the magnetization process in multilayers with perpendicular magnetic anisotropy (PMA) could not be described simply using coherent rotation model for uniaxial anisotropic ferromagnet.

Crystallographic and Magnetic Properties of CoCrPt Thin Films Investigated Using Single-Crystal Perpendicular Magnetic Thin Film Samples

2002 ◽  
Vol 721 ◽  
Author(s):  
Masaaki Futamoto ◽  
Kouta Terayama ◽  
Katsuaki Sato ◽  
Nobuyuki Inaba ◽  
Yoshiyuki Hirayama
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Magnetic Properties ◽  
Single Crystal ◽  
Film Plane ◽  
Magnetic Thin Film ◽  
X Ray Diffraction ◽  
Easy Magnetization ◽  
Transmission Electron ◽  
Magnetization Axis

AbstractConditions to prepare good single-crystal CoCrPt magnetic thin film with the easy magnetization axis perpendicular to the film plane were investigated using oxide single-crystal substrates, Al2O3(0001), LaAlO3(0001), mica(0001), SrTiO3(111), and MgO(111). The best CoCrPt(0001) single-crystal thin film was obtained on an Al2O3(0001) substrate employing a non-magnetic CoCrRu underlayer. The crystallographic quality of single-crystal thin film was investigated using X-ray diffraction and high-resolution transmission electron microscopy. Some intrinsic magnetic properties (Hk, Ku) were determined for the single-crystal CoCrxPty thin films for a compositional range of x=17-20at% and y=0-17at%.

scholarly journals Возможности магнитного псевдорезонанса в изучении тонких ферромагнитных пленок с одноосной магнитной анизотропией

2019 ◽  
Vol 89 (1) ◽  
pp. 72
Author(s):  
В.В. Демидов ◽  
А.Е. Мефёд
Keyword(s):  
Magnetic Anisotropy ◽  
Anisotropy Field ◽  
Resonance Peak ◽  
Easy Magnetization Axis ◽  
Easy Magnetization ◽  
Additional Information ◽  
Ferromagnetic Films ◽  
Magnetization Axis ◽  
X Band

AbstractPossibilities of magnetic pseudoresonance (a non-resonance peak of magnetic susceptibility) were studied and compared with the ferromagnetic resonance (FMR) in measuring the parameters of thin ferromagnetic films with in-plane uniaxial magnetic anisotropy. The measurements were conducted with two characteristic samples of ferromagnetic films showing this effect. A Q -meter operating at a frequency near 300 MHz (for pseudoresonance) and a standard X -band magnetic resonance spectrometer (for FMR) were used. The Q -meter working at 300 MHz was shown to detect reliably the magnetic pseudoresonance in both epitaxial and polycrystalline films. It was found that the accuracy of determination of the magnetic anisotropy field and orientation of the easy magnetization axis provided by the pseudoresonance method is as good as with FMR, and in some cases the pseudoresonance method gives additional information.

Preparation, Characterization and Magnetic Properties of Fe59Co41 Alloy Nanowires Using AC Electrochemical Deposition

2010 ◽  
Vol 152-153 ◽  
pp. 963-966
Author(s):  
Xue Hua Wang ◽  
Gui Chen ◽  
Liang Yang ◽  
Cheng Yong Li ◽  
Peng Cai
Keyword(s):  
Magnetic Properties ◽  
Anodic Aluminum Oxide ◽  
Perpendicular Magnetic Anisotropy ◽  
Nanowire Arrays ◽  
Easy Magnetization ◽  
Hexagonal Close Packed ◽  
Anodic Aluminum ◽  
Magnetization Axis ◽  
Alloy Nanowires ◽  
Anodic Aluminum Oxide Templates

Highly ordered Fe59Co41 alloy nanowires with a diameter of about 50 nm and length of about 4.1µm have been fabricated by alternating current (AC) electrodeposition into the anodic aluminum oxide templates. The morphology, structure and magnetic properties of Fe59Co41 alloy nanowires were characterized by TEM, EDS, XRD and VSM, respectively. The results indicate the Fe59Co41 nanowires with a high aspect ratio are very uniform and regular, which corresponds to the diameter of the nanochannel of the AAO membrane. XRD and HRTEM results show that the Fe59Co41 nanowires crystallize in hexagonal-close-packed (HCP) cobalt solid solution with [100] preferred orientation. VSM results show the Fe59Co41 nanowire arrays have a notable perpendicular magnetic anisotropy with easy magnetization axis along the nanowires. The magnetic properties of Fe59Co41 nanowire arrays are mainly predominated by shape anisotropy.

Characteristics of the Periodic Fine Structure in Domain Walls in Vacuum-Deposited Films

2012 ◽  
Vol 190 ◽  
pp. 518-521
Author(s):  
M.B. Sagdatkireeva ◽  
V.V. Rumyantseva ◽  
N.A. Khasanov
Keyword(s):  
Fine Structure ◽  
Domain Walls ◽  
Film Plane ◽  
Easy Magnetization Axis ◽  
Self Organization ◽  
Easy Magnetization ◽  
Domain Structures ◽  
Magnetization Axis ◽  
Deposited Films ◽  
Magnetoelastic Waves

The characteristics of the periodic fine structure in domain walls in oblique-evaporated films of quantum-well (QW) thickness with an easy-magnetization axis inclined with respect to the normal to the film plane has been studied. It is pointed out that the self-organization of domain structures is related to the quantum character of the cooperative phenomenon of ferromagnetism [. The spectrum of magnetoelastic waves has been calculated for films of iron type.

Nanocrystalline Soft Magnetic (Fe0.7Co0.3)88Hf2W2Mo2Zr1B4Cu1 Alloy with Enhanced Thermal Stability of Magnetic Properties

2015 ◽  
Vol 233-234 ◽  
pp. 611-614
Author(s):  
Vera A. Lukshina ◽  
Natalia V. Dmitrieva ◽  
Elena G. Volkova ◽  
Anatolii P. Potapov ◽  
Boris N. Filippov ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Magnetic Properties ◽  
Annealing Temperature ◽  
Easy Magnetization Axis ◽  
Soft Magnetic ◽  
Easy Magnetization ◽  
Tensile Stresses ◽  
Magnetization Axis ◽  
Axis Parallel ◽  
Thermal Stability Of

Magnetic properties, structure and thermal stability of the (Fe0.7Co0.3)88Hf2W2Mo2Zr1B4Cu1 alloy ribbon after its nanocrystallization at 620-750°C for 0-20 min in the presence or absence of tensile stresses σ were studied. It was shown that under the effect of tensile stresses a longitudinal magnetic anisotropy with an easy magnetization axis parallel to the long size of the ribbon was induced in the alloy. A better thermal stability of magnetic properties was observed for the alloy subjected to the nanocrystallization annealing at 620° for 20 min with σ = 170 MPa. After the subsequent annealing at 570°C for 25 h without σ, the magnetic properties of the alloy are unchanged. Increasing of the nanocrystallization annealing temperature up to 670-750°C did not result in improvement of the thermal stability of magnetic properties.

Ni thickness influence on magnetic properties (Co/Ni/Co/Pt) multilayers with perpendicular magnetic anisotropy

2017 ◽  
Vol 441 ◽  
pp. 585-589 ◽  
Author(s):  
R. Sbiaa ◽  
I.A. Al-Omari ◽  
M. Al Bahri ◽  
P.R. Kharel ◽  
M. Ranjbar ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy
Sign in / Sign up

Export Citation Format

Share Document