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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Nano-magnetic tunnel junctions controlled by electric field for straintronics
Peisen Li1, Xinping Yao1, Yueguo Hu1
1College of Intelligence Science and Technology, National University of Defense Technology, Changsha 410073, China. huyueguo1991@163.com.
Electric fields can control magnetic tunneling junctions (MTJs) for energy-efficient nonvolatile RAM. This study demonstrates electric field control of resistance and magnetic switching pathways in nanoscale MTJs, advancing the field of straintronics.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Nanotechnology
Background:
- Magnetic tunneling junctions (MTJs) are key for energy-efficient nonvolatile RAM.
- Research on electric field control of resistance in nanoscale MTJs is limited.
- Ferroelectric substrates offer a platform for electric field manipulation.
Purpose of the Study:
- To investigate electric field control of magnetoresistance in nanoscale MTJs.
- To understand the underlying mechanisms of electric field manipulation.
- To explore electric field-dependent magnetic switching pathways.
Main Methods:
- Integration of nanoscale MTJs on (011) oriented Pb(Mg1/3Nb2/3)0.7Ti0.3O3 (PMN-PT) ferroelectric substrates.
- Systematic investigation of magnetoresistance under varying magnetic and electric fields.
- Experimental validation and theoretical simulation of MTJ behavior.
Main Results:
- Demonstration of a single magnetic domain state in nanoscale MTJs.
- Observation of significant electric field control over R-H curves.
- Explanation of electric field effects via magnetoelastic energy and shape anisotropy competition.
- Prediction of electric field-dependent chiral switching pathways.
Conclusions:
- Electric field control of nanoscale MTJ resistance and magnetic switching is achievable.
- This work is a significant step towards the realization of straintronics.
- The findings pave the way for novel energy-efficient electronic devices.
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