Effect of metallic Mg insertion in CoFeB/MgO interface perpendicular magnetic tunnel junction on tunnel magnetoresistance ratio observed by Synchrotron x-ray diffraction

2020 ◽  
Vol 38 (3) ◽  
pp. 033801
Author(s):  
Masaaki Niwa ◽  
Hiroaki Honjo ◽  
Loku Singgappulige Rosantha Kumara ◽  
Hirofumi Inoue ◽  
Shoji Ikeda ◽  
...  
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
X Ray Diffraction ◽  
Tunnel Magnetoresistance ◽  
X Ray ◽  
Magnetoresistance Ratio

High Tunnel Magnetoresistance in Mo/CoFe/MgO Magnetic Tunnel Junction: A First-Principles Study

2017 ◽  
Vol 53 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Jiaqi Zhou ◽  
Weisheng Zhao ◽  
Shouzhong Peng ◽  
Junfeng Qiao ◽  
Jacques-Olivier Klein ◽  
...  
Keyword(s):  
Tunnel Junction ◽  
First Principles ◽  
Magnetic Tunnel Junction ◽  
High Tunnel ◽  
Tunnel Magnetoresistance ◽  
First Principles Study

Chemical diffusion: Another factor affecting the magnetoresistance ratio in Ta/CoFeB/MgO/CoFeB/Ta magnetic tunnel junction

2012 ◽  
Vol 101 (1) ◽  
pp. 012406 ◽  
Author(s):  
Y. Yang ◽  
W. X. Wang ◽  
Y. Yao ◽  
H. F. Liu ◽  
H. Naganuma ◽  
...  
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Chemical Diffusion ◽  
Magnetoresistance Ratio

Resonant Tunnel Magnetoresistance in a Double Magnetic Tunnel Junction

2011 ◽  
Vol 25 (8) ◽  
pp. 2573-2576
Author(s):  
A. N. Useinov ◽  
N. K. Useinov ◽  
L. R. Tagirov ◽  
J. Kosel
Keyword(s):  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Tunnel Magnetoresistance ◽  
Resonant Tunnel

scholarly journals Tunnel Magnetoresistance of Fe3O4/MgO/Fe Nanostructures

2011 ◽  
Vol 2011 ◽  
pp. 1-3
Author(s):  
S. G. Chigarev ◽  
E. M. Epshtein ◽  
I. V. Malikov ◽  
G. M. Mikhailov ◽  
P. E. Zilberman
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Tunnel Junction ◽  
Magnetic Energy ◽  
Magnetic Tunnel Junction ◽  
Tunnel Magnetoresistance ◽  
Unidirectional Anisotropy ◽  
Layer Orientation ◽  
Layer Magnetization

A magnetic tunnel junction Fe3O4/MgO/Fe with (001) layer orientation is considered. The junction magnetic energy is analyzed as a function of the angle between the layer magnetization vectors under various magnetic fields. The tunnel magnetoresistance is calculated as a function of the external magnetic field. In contrast with junctions with unidirectional anisotropy, a substantially lower magnetic field is required for the junction switching.

Magnetoresistance Effects for the Inhomogeneous Perovskite System of Ag Doped La0.833Na0.167MnO3

2011 ◽  
Vol 110-116 ◽  
pp. 553-558
Author(s):  
Jian Wu
Keyword(s):  
Perovskite Phase ◽  
Inhomogeneous System ◽  
X Ray Diffraction ◽  
Magnetoresistance Effect ◽  
Two Phase ◽  
X Ray ◽  
Magnetoresistance Ratio ◽  
Diffraction Patterns ◽  
System 1 ◽  
Relative Change

The transport properties of the inhomogeneous system (1/4) Ag2O-La0.833Na0.167MnO3(LNMO/Ag) have been systematically studied. X-ray diffraction patterns show that the LNMO/Ag sample is the two-phase composite and consists of a magnetic La0.833Na0.167MnO3(LNMO) perovskite phase and a nonmagnetic Ag metal phase. The resistivity of the sample decreases dramatically with Ag added into the pure perovskite LNMO manganites. For the LNMO/Ag sample, the Curie temperatureTCis 331 ± 2 K and slightly higher than that of the LNMO sample (323 ± 2 K). Due to the dope of Ag metal, the room temperature magnetoresistance effect is enhanced significantly (from 7% for the pure LNMO manganites to 23% for the LNMO/Ag sample under a relative lower field of 0.5 T and from 37.5% for the LNMO sample to 41 % for the LNMO/Ag sample under a high field of 6 T at the temperature of 330 K. In the low temperature regime, the magnetoresistance ratio of the LNMO/Ag sample is smaller than that of the LNMO sample, which is contrary to the magnetoresistance effect in high temperature. The effects are discussed qualitatively by use of a model which is based on the relative change among the intrinsic magnetoresistance effect and the extrinsic magnetoresistance effect.

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