Reduction of critical current density for out-of-plane mode oscillation in a mag-flip spin torque oscillator using highly spin-polarized Co2Fe(Ga0.5Ge0.5) spin injection layer

2016 ◽  
Vol 108 (7) ◽  
pp. 072403 ◽  
Author(s):  
S. Bosu ◽  
H. Sepehri-Amin ◽  
Y. Sakuraba ◽  
M. Hayashi ◽  
C. Abert ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Spin Injection ◽  
Spin Torque ◽  
Spin Polarized ◽  
Mode Oscillation ◽  
Out Of Plane ◽  
Plane Mode

scholarly journals Influence of spin injection on the critical current density in La0.7Sr0.3MnO3/La1.85Sr0.15CuO4 heterostructure

AIP Advances ◽  
2014 ◽  
Vol 4 (12) ◽  
pp. 127138 ◽  
Author(s):  
M. J. Zhang ◽  
M. L. Teng ◽  
F. X. Hao ◽  
Y. W. Yin ◽  
X. G. Li ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Spin Injection

scholarly journals Micromagnetic Simulation of Strain-Assisted Current-Induced Magnetization Switching

2016 ◽  
Vol 2016 ◽  
pp. 1-6
Author(s):  
H. B. Huang ◽  
C. P. Zhao ◽  
X. Q. Ma
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Phase Field ◽  
Tunnel Junctions ◽  
Magnetic Domain ◽  
Misfit Strain ◽  
Micromagnetic Simulation ◽  
Magnetization Switching ◽  
Out Of Plane

We investigated the effect of substrate misfit strain on the current-induced magnetization switching in magnetic tunnel junctions by combining micromagnetic simulation with phase-field microelasticity theory. Our results indicate that the positive substrate misfit strain can decrease the critical current density of magnetization switching by pushing the magnetization from out-of-plane to in-plane directions, while the negative strain pushes the magnetization back to the out-of-plane directions. The magnetic domain evolution is obtained to demonstrate the strain-assisted current-induced magnetization switching.

High critical current density YBa2Cu3O7δ thick films using ion beam assisted deposition MgO bi-axially oriented template layers on nickel-based superalloy substrates

2001 ◽  
Vol 16 (8) ◽  
pp. 2175-2178 ◽  
Author(s):  
J. R. Groves ◽  
P. N. Arendt ◽  
S. R. Foltyn ◽  
Q. X. Jia ◽  
T. G. Holesinger ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Ion Beam ◽  
Continuous Process ◽  
Coated Conductors ◽  
Nickel Based Superalloy ◽  
Ion Beam Assisted Deposition ◽  
Out Of Plane ◽  
Amorphous Si

Nickel-based superalloys have been coated with magnesium oxide (MgO) using ion-beam-assisted deposition (IBAD). This technique produced a well-oriented bi-axially textured MgO template layer with a Ф scan full width half maximum of 6.4°. The layer architecture for these samples was as follows: polished hastelloy C276/amorphous Si3N4/IBAD MgO/ pulsed laser deposited (PLD) Y2O3–ZrO2/PLD CeO2/PLD YBa2Cu3O7?δ. The subsequent heteroepitaxial PLD of 1.5-mm-thick YBCO showed a nominal critical current density of over 1 MA/cm2 (75 K, self-field) along a microbridge and had an in-plane mosaic spread of 4.8° and an out-of-plane spread of 1.3°. These results compare well with our earlier work using IBAD yttria-stabilized zirconia (YSZ) as a template layer and indicate that IBAD MgO is a suitable substitute. Furthermore, these results suggest that IBAD MgO could be adapted to and increase the feasibility of a continuous process to fabricate longer lengths of coated conductors at speeds 100 times faster than that previously realized with IBAD YSZ.

Reduction in critical current density by tuning damping constants of CoFeB for spin-torque-transfer switching

2009 ◽  
Vol 42 (11) ◽  
pp. 115006 ◽  
Author(s):  
Chih-Liang Wang ◽  
Sheng-Huang Huang ◽  
Chih-Huang Lai ◽  
Wei-Chuan Chen ◽  
Shan-Yi Yang ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Spin Torque ◽  
Spin Torque Transfer

Reduction in critical current density for spin torque transfer switching with composite free layer

2008 ◽  
Vol 93 (9) ◽  
pp. 092504 ◽  
Author(s):  
Cheng-Tyng Yen ◽  
Wei-Chuan Chen ◽  
Ding-Yeong Wang ◽  
Yuan-Jen Lee ◽  
Chih-Ta Shen ◽  
...  
Keyword(s):  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Spin Torque ◽  
Free Layer ◽  
Spin Torque Transfer

Microstructural characterization of YBa2Cu3O7-x thin films formed by metalorganic CVD

1991 ◽  
Vol 49 ◽  
pp. 1080-1081
Author(s):  
P. Lu ◽  
W. Huang ◽  
C.S. Chern ◽  
Y.Q. Li ◽  
J. Zhao ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Critical Current Density ◽  
Critical Current ◽  
Current Density ◽  
Film Growth ◽  
Chemical Vapor ◽  
Microstructural Characterization ◽  
Ion Milling ◽  
Conventional Grinding

The YBa2Cu3O7-x thin films formed by metalorganic chemical vapor deposition(MOCVD) have been reported to have excellent superconducting properties including a sharp zero resistance transition temperature (Tc) of 89 K and a high critical current density of 2.3x106 A/cm2 or higher. The origin of the high critical current in the thin film compared to bulk materials is attributed to its structural properties such as orientation, grain boundaries and defects on the scale of the coherent length. In this report, we present microstructural aspects of the thin films deposited on the (100) LaAlO3 substrate, which process the highest critical current density.Details of the thin film growth process have been reported elsewhere. The thin films were examined in both planar and cross-section view by electron microscopy. TEM sample preparation was carried out using conventional grinding, dimpling and ion milling techniques. Special care was taken to avoid exposure of the thin films to water during the preparation processes.

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