scholarly journals High sensitivity microwave detection using a magnetic tunnel junction in the absence of an external applied magnetic field

2015 ◽  
Vol 106 (15) ◽  
pp. 152403 ◽  
Author(s):  
Y. S. Gui ◽  
Y. Xiao ◽  
L. H. Bai ◽  
S. Hemour ◽  
Y. P. Zhao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tunnel Junction ◽  
Applied Magnetic Field ◽  
Magnetic Tunnel Junction ◽  
High Sensitivity ◽  
Microwave Detection

L10-MnGa based magnetic tunnel junction for high magnetic field sensor

2017 ◽  
Vol 50 (28) ◽  
pp. 285002 ◽  
Author(s):  
X P Zhao ◽  
J Lu ◽  
S W Mao ◽  
Z F Yu ◽  
H L Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Magnetic Field ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Magnetic Field Sensor ◽  
Field Sensor

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.

scholarly journals Double-Gap Magnetic Flux Concentrator Design for High-Sensitivity Magnetic Tunnel Junction Sensors

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4475 ◽  
Author(s):  
Jiafei Hu ◽  
Minhui Ji ◽  
Weicheng Qiu ◽  
Long Pan ◽  
Peisen Li ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Tunnel Junction ◽  
High Performance ◽  
Three Dimensional ◽  
Magnetic Tunnel Junction ◽  
High Sensitivity ◽  
Element Model ◽  
Ion Milling ◽  
Field Amplification ◽  
Flux Concentrator

To improve the sensitivity of the magnetic tunnel junction(MTJ)sensor, a novel architecture for a double-gap magnetic flux concentrator (MFC) was studied theoretically and experimentally in this paper. The three-dimensional finite element model of magnetic flux was established to optimize the magnetic field amplification factor, with different gaps. The simulation results indicate that the sensitivity of an MTJ sensor with a double-gap MFC can be significantly better than that of a sensor with a traditional single-gap MFC, due to the fact that the magnetic magnification sharply increases with the decrease in effective gap width. Besides this, the half-bridge MTJ sensors with the double-gap MFC were fabricated using photolithography, ion milling, evaporation, and electroplating processes. Experimental results show that the sensitivity of the MTJ sensor increased by ten times compared to the sensor without the double-gap MFC, which underlines the theoretical predictions. Furthermore, there is no significant increase in the sensor noise. The work in this paper contributes to the development of high-performance MTJ sensors.

A complementary magnetic field sensor using magnetic tunnel junction

2015 ◽  
Author(s):  
Ding-Yeong Wang ◽  
Keng-Ming Kuo ◽  
Cheng-Wei Chien ◽  
Shan-Yi Yang ◽  
Sheng-Huang Huang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Magnetic Field Sensor ◽  
Field Sensor

scholarly journals Current-induced magnetization switching in a nano-scale CoFeB-MgO magnetic tunnel junction under in-plane magnetic field

AIP Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 055927 ◽  
Author(s):  
N. Ohshima ◽  
H. Sato ◽  
S. Kanai ◽  
J. Llandro ◽  
S. Fukami ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Magnetization Switching ◽  
Nano Scale

Tuning of MgO barrier magnetic tunnel junction bias current for picotesla magnetic field detection

2006 ◽  
Vol 99 (8) ◽  
pp. 08K706 ◽  
Author(s):  
R. Ferreira ◽  
P. Wisniowski ◽  
P. P. Freitas ◽  
J. Langer ◽  
B. Ocker ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Bias Current ◽  
Field Detection

scholarly journals Magnetic Field Sensor Based on Magnetic Tunnel Junction with Voltage-Tunable Magnetic Anisotropy

2015 ◽  
Vol 127 (2) ◽  
pp. 496-498
Author(s):  
W. Skowroński ◽  
P. Wiśniowski ◽  
J. Wrona ◽  
A. Żywczak ◽  
T. Stobiecki
Keyword(s):  
Magnetic Field ◽  
Magnetic Anisotropy ◽  
Tunnel Junction ◽  
Magnetic Tunnel Junction ◽  
Magnetic Field Sensor ◽  
Field Sensor
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