scholarly journals Uniaxial magnetic anisotropy induced by vicinal surfaces in half metallic La0.7Sr0.3MnO3 thin films

2009 ◽  
Vol 1198 ◽  
Author(s):  
Paolo Perna ◽  
Erika Jiménez ◽  
Francisco J. Terán ◽  
Laurence Méchin ◽  
Julio Camarero ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Substrate Surface ◽  
Uniaxial Anisotropy ◽  
Current Theory ◽  
Vicinal Surfaces ◽  
Direction Parallel ◽  
Half Metallic ◽  
Crystalline Symmetry

AbstractWe present a detailed study of the angular dependence of the magnetization reversal at room temperature of well characterized epitaxial La0.7Sr0.3MnO3 (001) thin films grown onto SrTiO3 (001) vicinal substrates. The step edges at the substrate surface promote a topological modulation of the films along the step direction, breaking the four-fold magneto crystalline symmetry and favoring a two-fold magnetic anisotropy term. The competition between the biaxial and uniaxial anisotropy is depicted within the framework of the current theory, resulting in a vanishing biaxial contribution. The films hence show the magnetization easy (hard) direction parallel (perpendicular) to the steps direction. The thickness-dependent of both anisotropy and magnetization reversal are discussed in terms of topographic changes.

Spin Reorientation Transition and Magnetization Reversal Mechanism of Gd Doped FeCo High-Frequency Soft Magnetic Thin Films

2014 ◽  
Vol 924 ◽  
pp. 141-151 ◽  
Author(s):  
Yu Rong An ◽  
Yue Li ◽  
Zhen Wang ◽  
Ya Lu Zuo ◽  
Li Xi
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
High Frequency ◽  
Uniaxial Anisotropy ◽  
Spin Reorientation ◽  
Spin Reorientation Transition ◽  
Sputtering Power ◽  
Deposition Power ◽  
Reversal Mechanism

The magnetic FeCoGd thin films with various sputtering power from 10 to 30 W were fabricated on glass substrates by magnetron co-sputtering. The crystal structure of as-deposited FeCoGd thin films was investigated by X-ray diffraction. And an increasing trend of grain size with the increasing sputtering power was shown. When sputtering power is below 30 W, the films exhibited obviously in-plane uniaxial magnetic anisotropy, and the in-plane magnetic anisotropy field Hkdecreased with increasing deposition power. Moreover, good high frequency characteristics were obtained. The magnetization reversal mechanism has been investigated via the in-plane angular dependences of the magnetization and the coercivity. The experimental data points indicated that the magnetization reversal mechanism of FeCoGd film with in-plane uniaxial anisotropy is domain-wall depinning and coherent rotation when the applied field is close to the easy axis and hard axis, respectively. A spin reorientation transition phenomenon was observed when deposition power is larger than 30 W. A stripe domain structure for the sample with 30 W deposition power was developed due to a dominated perpendicular magnetic anisotropy.

Magnetic anisotropy and magnetization reversal of La0.67Sr0.33MnO3 thin films on SrTiO3(110)

2010 ◽  
Vol 108 (10) ◽  
pp. 103906 ◽  
Author(s):  
Hans Boschker ◽  
Jaap Kautz ◽  
Evert P. Houwman ◽  
Gertjan Koster ◽  
Dave H. A. Blank ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal

Magnetization reversal and magnetic anisotropy in patterned Co/Pd multilayer thin films

2008 ◽  
Vol 103 (2) ◽  
pp. 023920 ◽  
Author(s):  
Darren Smith ◽  
Vishal Parekh ◽  
Chunsheng E ◽  
Shishan Zhang ◽  
Wolfgang Donner ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Multilayer Thin Films

scholarly journals Publisher’s Note: “Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films” [J. Appl. Phys. 110, 013919 (2011)]

2011 ◽  
Vol 110 (8) ◽  
pp. 089903 ◽  
Author(s):  
P. Perna ◽  
C. Rodrigo ◽  
E. Jiménez ◽  
F. J. Teran ◽  
N. Mikuszeit ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Half Metallic

scholarly journals Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films

2011 ◽  
Vol 110 (1) ◽  
pp. 013919 ◽  
Author(s):  
P. Perna ◽  
C. Rodrigo ◽  
E. Jiménez ◽  
F. J. Teran ◽  
N. Mikuszeit ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Half Metallic

Magnetization Reversal by Rotation in Magnetic Thin Films Deposited on Step Bunched Si(111) Substrates

1997 ◽  
Vol 475 ◽  
Author(s):  
M. Sussiau ◽  
A. Encinas ◽  
F. Nguyen Van Dau ◽  
A. Vaurès ◽  
A. Schuhl ◽  
...  
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Magnetization Reversal ◽  
Molecular Beam ◽  
Uniaxial Anisotropy ◽  
Magnetic Thin Films ◽  
Induced Anisotropy ◽  
Reversal Process ◽  
Magnetic Metal ◽  
Magnetization Reversal Process

ABSTRACTMagnetic and magnetoresistive properties of magnetic thin films deposited on periodically structured substrates have been studied. By using a thermodynamical heat treatment, we activate the step bunching phenomenon on vicinal Si(111) substrates misoriented towards [112] which results in a laterally modulated surface with a period around 0.1 μm. Epitaxial magnetic thin films deposited on these substrates exhibit an in-plane uniaxial anisotropy and a specific magnetoresistive behavior which characterizes the magnetization reversal process. In this contribution, we demonstrate that these properties can also be observed in non-epitaxial structures grown either by molecular beam epitaxy or by sputtering. In particular, magnetotransport measurements show that by varying parameters such as the nature of the magnetic metal, the layer thickness or the strength of the induced anisotropy, we can modulate the interplay between the anisotropy and the exchange stiffness, and, consequently, observe gradual magnetization reversal behaviors between a Stoner-Wohlfarth uniform mode and a non-uniform mode.

Uniaxial magnetic anisotropy in electrodeposited thin films arising from lattice distortion

1968 ◽  
Vol 46 (20) ◽  
pp. 2259-2262 ◽  
Author(s):  
J. E. Fisher
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Single Crystal ◽  
Lattice Distortion ◽  
Magnetocrystalline Anisotropy ◽  
Uniaxial Anisotropy ◽  
Uniaxial Magnetic Anisotropy ◽  
Nickel Thin Films ◽  
Planar Film

The usual expression for the magnetocrystalline anisotropy is rewritten for the magnetization referred to the easy axes of the f.c.c. lattice. It is suggested that distortion due to planar film strain produces easy directions different from the [Formula: see text] crystallographic directions and results in the appearance of a large uniaxial anisotropy, Ku, superimposed upon the expected magnetocrystalline anisotropy. A strain of 1 × 10−4 in nickel is considered and is shown to produce a Ku of the order of 105 erg cm−3, comparable with that measured experimentally on electrodeposited (110) single-crystal nickel thin films.

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