scholarly journals Strong perpendicular magnetic anisotropy energy density at Fe alloy/HfO2 interfaces

2017 ◽  
Vol 110 (19) ◽  
pp. 192403 ◽  
Author(s):  
Yongxi Ou ◽  
D. C. Ralph ◽  
R. A. Buhrman
Keyword(s):  
Energy Density ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Anisotropy Energy ◽  
Magnetic Anisotropy Energy

Pair Ordering Anisotropy In Amorphous Tb-Fe Thin Films

1995 ◽  
Vol 384 ◽  
Author(s):  
T.C. Hufnagel ◽  
S. Brennan ◽  
B.M. Clemens
Keyword(s):  
Thin Films ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
High Energy ◽  
Distribution Functions ◽  
Anisotropy Energy ◽  
Magnetic Anisotropy Energy ◽  
Structural Anisotropy ◽  
Out Of Plane ◽  
Plane Direction

ABSTRACTWe have studied the structural origins of perpendicular magnetic anisotropy in amorphous Tb-Fe thin films by employing high energy x-ray scattering. The as-deposited films show a clear structural anisotropy, with a preference for Fe-Tb near-neighbors to align in the out-of-plane direction. Upon annealing, the magnetic anisotropy energy drops significantly, and we see a corresponding reduction in the structural anisotropy. The radial distribution functions indicate that the number of Fe-Tb near-neighbors increases in the in-plane direction, but does not change in the out-of-plane direction. Therefore, the distribution of Fe-Tb near-neighbors becomes more uniform upon annealing. We conclude that the observed reduction in perpendicular magnetic anisotropy energy is a result of this change in structure.

Observation of Magnetic Compton Profile of Interface Controlled Co/Pd Multilayer

2011 ◽  
Vol 497 ◽  
pp. 8-12 ◽  
Author(s):  
Kosuke Suzuki ◽  
Naoto Go ◽  
Shun Emoto ◽  
Ryutaro Yamaki ◽  
Masayoshi Itou ◽  
...  
Keyword(s):  
Wave Function ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Anisotropy Energy ◽  
Compton Profile ◽  
Rough Interface ◽  
Magnetic Anisotropy Energy ◽  
Smooth Interface ◽  
Rough Interfaces

We compare two Co/Pd multilayers with correspondingly smooth and rough interfaces. The first is a Co (1.5 nm)/Pd (2.6 nm) multilayer with a smooth interface deposited by the MBE technique, and the second is a Co (1.6 nm)/Pd (4.0 nm) multilayer with a rough interface deposited by the sputter technique. Both multilayers have almost the same perpendicular magnetic anisotropy energy, 1.15 Merg/cc for the Co (1.5 nm)/Pd (2.6 nm) multilayer and 1.20 Merg/cc for the Co (1.6 nm)/Pd (4.0 nm) multilayer, respectively. The symmetry of the wave function, which is measured using the magnetic Compton profile, is almost the same for both multilayers. This suggests that the smooth interface controls the wave function and enhances the PMA energy even if the Co/Pd multilayer has a thinner Pd layer.

Synthesis And Properties Of Magnetic Nanoparticles With Tunable Magnetic Anisotropy Energy

2014 ◽  
Vol 1708 ◽  
Author(s):  
Vincent Dupuis ◽  
Véronica Gavrilov-Isaac ◽  
Sophie Neveu ◽  
Merwen Aouadi ◽  
Sébastien Abramson
Keyword(s):  
Magnetic Nanoparticles ◽  
Energy Density ◽  
Low Temperature ◽  
Magnetic Anisotropy ◽  
Good Control ◽  
Anisotropy Energy ◽  
Blocking Temperature ◽  
Magnetic Anisotropy Energy ◽  
Shell Nanoparticles ◽  
Weak Anisotropy

ABSTRACTIn this paper, we discuss several strategies to tailor magnetic properties related to the magnetic anisotropy energy, such as the blocking temperature or the low temperature coercivity, of magnetic nanoparticles or materials made with magnetic nanoparticles. We describe a first approach that consists in synthesizing and dispersing bi and tri-magnetic core-shell nanoparticles that include a core made of a material with a weak anisotropy energy density and a shell made with a material with a large anisotropy energy density. This approach is a promising route to tune the blocking temperature of low temperature coercivity of a particle without altering its magnetization and with a good control of its size. Additionally, we also explore another route for the control of the shape of the hysteresis loop of material made with magnetic nanoparticles that consists in the simple mixture of magnetically soft and hard magnetic nanoparticles to create binary mixtures. In this case, it is the mixing ratio that allows one to adjust the properties of the final material.

Magnetic anisotropy energy of antiferromagnetic coupled Fe/Cr/Fe layers (abstract)

1991 ◽  
Vol 69 (8) ◽  
pp. 5321-5321
Author(s):  
C. M. Williams ◽  
J. J. Krebs ◽  
G. A. Prinz ◽  
A. Chaiken
Keyword(s):  
Magnetic Anisotropy ◽  
Anisotropy Energy ◽  
Magnetic Anisotropy Energy
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