Magnetic anisotropy of strain-engineered InMnAs ferromagnetic films and easy-axis manipulation from out-of-plane to in-plane orientations

2005 ◽  
Author(s):  
X. Liu
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Ferromagnetic Films ◽  
Out Of Plane

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.

Magnetic Anisotropy and Growth Texture in Co35Pd65 Films

1997 ◽  
Vol 475 ◽  
Author(s):  
S. U. Jen ◽  
J. Y. Huang ◽  
K. B. Huang
Keyword(s):  
Magnetic Anisotropy ◽  
Saturation Magnetization ◽  
Easy Axis ◽  
Profile Analysis ◽  
Surface Topology ◽  
Perpendicular Anisotropy ◽  
Atomic Force ◽  
Squareness Ratio ◽  
Out Of Plane ◽  
Pd Alloy

ABSTRACTPd-rich Co-Pd alloy films are well known to exhibit perpendicular anisotropy. In this study, Co35Pd65 films were made by the vapor deposition method. The thickness of the films ranged from 80 to 2000 Å. Following measurements were carried out on each film sample: the impurities and alloy compositions were checked by Auger depth profile analysis (AES), the surface topology was mapped out by an atomic force microscope (AFM), the structural analysis was done by using the X-ray diffractometer (XRD), and the magnetic properties, such as magnetic anisotropy and saturation magnetization, were measured by a SQUID magnetometer and/or a MOKE (using the longitudinal or polar effect) apparatus. Magnetic quantities, such as the out-of-plane (either hard or easy axis) squareness ratio Mr/Ms, saturation magnetization Ms, and anisotropy energy Ku, are closely related to the structural properties, such as the degree of (111) texture, grain size D, mode of growth (nucleation texture or growth texture), and impurities in films. The emphasis is placed on the thickness dependence of these quantities, and the interrelationship among them.

Out-of-plane magnetic anisotropy energy in the Ni3Bz3 molecule

2019 ◽  
Vol 21 (9) ◽  
pp. 5305-5311
Author(s):  
Tomás Alonso-Lanza ◽  
Jhon W. González ◽  
Faustino Aguilera-Granja ◽  
Andrés Ayuela
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Anisotropy Energy ◽  
Magnetic Anisotropy Energy ◽  
Metal Atoms ◽  
Out Of Plane

Ni3Bz3 molecule shows a large magnetic anisotropy energy of 8 meV, with the easy axis perpendicular to the plane of Ni metal atoms. Note that the corresponding bare Ni3 cluster has an in-plane easy axis.

scholarly journals Out-of-Plane Magnetic Anisotropy in Ordered Ensembles of FeyN Nanocrystals Embedded in GaN

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3294
Author(s):  
Andrea Navarro-Quezada ◽  
Katarzyna Gas ◽  
Tia Truglas ◽  
Viola Bauernfeind ◽  
Margherita Matzer ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Easy Axis ◽  
Magnetic Nanostructures ◽  
Growth Direction ◽  
Strain Engineering ◽  
Recording Media ◽  
Perpendicular Recording ◽  
Out Of Plane ◽  
High Density Recording ◽  
Magnetic Easy Axis

Phase-separated semiconductors containing magnetic nanostructures are relevant systems for the realization of high-density recording media. Here, the controlled strain engineering of GaδFeN layers with FeyN embedded nanocrystals (NCs) via AlxGa1−xN buffers with different Al concentration 0<xAl<41% is presented. Through the addition of Al to the buffer, the formation of predominantly prolate-shaped ε-Fe3N NCs takes place. Already at an Al concentration xAl≈ 5% the structural properties—phase, shape, orientation—as well as the spatial distribution of the embedded NCs are modified in comparison to those grown on a GaN buffer. Although the magnetic easy axis of the cubic γ’-GayFe4−yN nanocrystals in the layer on the xAl=0% buffer lies in-plane, the easy axis of the ε-Fe3N NCs in all samples with AlxGa1−xN buffers coincides with the [0001] growth direction, leading to a sizeable out-of-plane magnetic anisotropy and opening wide perspectives for perpendicular recording based on nitride-based magnetic nanocrystals.

Realizing large out-of-plane magnetic anisotropy in L10-FeNi films grown by nitrogen-surfactant epitaxy on Cu(001)

2020 ◽  
Vol 4 (5) ◽  
Author(s):  
Kaishu Kawaguchi ◽  
Toshio Miyamachi ◽  
Takushi Iimori ◽  
Yuki Takahashi ◽  
Takuma Hattori ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Out Of Plane

scholarly journals Route towards efficient magnetization reversal driven by voltage control of magnetic anisotropy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Roxana-Alina One ◽  
Hélène Béa ◽  
Sever Mican ◽  
Marius Joldos ◽  
Pedro Brandão Veiga ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Random Access ◽  
Low Power Consumption ◽  
Surface Anisotropy ◽  
Magnetization Dynamics ◽  
Storage Density ◽  
Switching Regime ◽  
Major Interest ◽  
Out Of Plane

AbstractThe voltage controlled magnetic anisotropy (VCMA) becomes a subject of major interest for spintronics due to its promising potential outcome: fast magnetization manipulation in magnetoresistive random access memories with enhanced storage density and very low power consumption. Using a macrospin approach, we carried out a thorough analysis of the role of the VCMA on the magnetization dynamics of nanostructures with out-of-plane magnetic anisotropy. Diagrams of the magnetization switching have been computed depending on the material and experiment parameters (surface anisotropy, Gilbert damping, duration/amplitude of electric and magnetic field pulses) thus allowing predictive sets of parameters for optimum switching experiments. Two characteristic times of the trajectory of the magnetization were analyzed analytically and numerically setting a lower limit for the duration of the pulses. An interesting switching regime has been identified where the precessional reversal of magnetization does not depend on the voltage pulse duration. This represents a promising path for the magnetization control by VCMA with enhanced versatility.

scholarly journals Non-monotonic magnetic anisotropy behavior as a function of adsorbate coverage in Fe ultrathin films near the spin reorientation transition

2021 ◽  
Author(s):  
A. Quesada ◽  
G. Chen ◽  
A. T. N'Diaye ◽  
P. Wang ◽  
Y. Z. Wu ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Magnetic Anisotropy ◽  
Ultrathin Films ◽  
Co Adsorption ◽  
Spin Reorientation ◽  
Spin Reorientation Transition ◽  
Out Of Plane

Carbon monoxide (CO) adsorption on ultrathin fcc Fe films is known to result in the rotation of magnetization from out-of-plane to in-plane.

Effect of substrates on the out-of-plane magnetic anisotropy in Au/Co/Au sandwiches

1996 ◽  
Vol 154 (2) ◽  
pp. 160-164 ◽  
Author(s):  
P. Beauvillain ◽  
C. Chappert ◽  
K. Le Dang ◽  
R. Mégy ◽  
S. Ould Mahfoud ◽  
...  
Keyword(s):  
Magnetic Anisotropy ◽  
Out Of Plane
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