INVESTIGATING ELECTRIC FIELD CONTROL OF MAGNETISM WITH NEUTRON SCATTERING, NONLINEAR OPTICS AND SYNCHROTRON X-RAY SPECTROMICROSCOPY

This paper discusses recent efforts to control magnetism with electric fields in single and multilayer oxides, which has great potential to improve a variety of technological endeavors, such as magnetic sensing and magnetoelectric (ME) logic. The importance of electrical control of magnetism is followed by a discussion of multiferroics and MEs, which are the leading contenders for this task. The focus of this paper is on complementary methods in understanding the ME coupling, an essential step to electrical control of magnetism. Neutron scattering, nonlinear optics and X-ray spectromicroscopy are addressed in providing key parameters in the study of ME coupling. While primarily direct (single-phase multiferroics) ME materials are used as examples, the techniques discussed are also valuable to the study of indirect (e.g., multilayers and pillars) magnetoelectrics. We conclude with a summary of the field and future directions.

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ChemInform Abstract: Investigating Electric Field Control of Magnetism with Neutron Scattering, Nonlinear Optics and Synchrotron X-Ray Spectromicroscopy

ChemInform ◽

10.1002/chin.201248251 ◽

2012 ◽

Vol 43 (48) ◽

pp. no-no

Author(s):

M. B. Holcomb ◽

S. Polisetty ◽

A. Fraile Rodriguez ◽

V. Gopalan ◽

R. Ramesh

Keyword(s):

Nonlinear Optics ◽

Electric Field ◽

Neutron Scattering ◽

X Ray ◽

Field Control

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Electric-field control of field-free spin-orbit torque switching via laterally modulated Rashba effect in Pt/Co/AlOx structures

10.21203/rs.3.rs-87924/v1 ◽

2020 ◽

Author(s):

Min-Gu Kang ◽

Jong-Guk Choi ◽

Jimin Jeong ◽

Jae Yeol Park ◽

Hyeon-Jong Park ◽

...

Keyword(s):

Electric Field ◽

Coupling Effect ◽

Spin Orbit ◽

Rashba Effect ◽

Oxide Interface ◽

Electrical Control ◽

Perpendicular Magnetization ◽

Field Control ◽

Out Of Plane ◽

Logic Operations

Abstract Spin-orbit coupling effect in structures with broken inversion symmetry, known as the Rashba effect, facilitates spin-orbit torques (SOTs) in heavy metal/ferromagnet/oxide structures, along with the spin Hall effect. Electric-field control of the Rashba effect is established for semiconductor interfaces, but it is challenging in structures involving metals owing to the screening effect. Here, we report that the Rashba effect in Pt/Co/AlOx structures is laterally modulated by electric voltages, generating out-of-plane SOTs. This enables field-free switching of the perpendicular magnetization and electrical control of the switching polarity. Changing the gate oxide reverses the sign of out-of-plane SOT while maintaining the same sign of voltage-controlled magnetic anisotropy, which confirms the Rashba effect at the Co/oxide interface is a key ingredient of the electric-field modulation. The electrical control of SOT switching polarity in a reversible and non-volatile manner can be utilized for programmable logic operations in spintronic logic-in-memory devices.

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Insect Physical Control: Electric Field-Based Pest Management Approach

Insects ◽

10.3390/insects11080480 ◽

2020 ◽

Vol 11 (8) ◽

pp. 480

Author(s):

Hideyoshi Toyoda

Keyword(s):

Electric Field ◽

Pest Management ◽

Electric Fields ◽

Research Field ◽

Management Approach ◽

Special Issue ◽

Future Directions ◽

Physical Control ◽

New Research ◽

Electric Field Generation

The Special Issue ‘Insect physical control: electric field-based pest management approach’ was launched to showcase valuable new research on pest control using applied electrostatic engineering. Some phenomena generated in static and dynamic electric fields can be used to build new devices to capture or kill target insects using an attractive force or a force striking insects entering an electric field. This research field is new, and there are few researchers currently working within it. Consequently, this editorial introduces the history and general principles of electric field generation. I then discuss future directions for this field.

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Electric field control of multiferroic domains inNi3V2O8imaged by x-ray polarization-enhanced topography

Physical Review B ◽

10.1103/physrevb.82.024434 ◽

2010 ◽

Vol 82 (2) ◽

Cited By ~ 23

Author(s):

F. Fabrizi ◽

H. C. Walker ◽

L. Paolasini ◽

F. de Bergevin ◽

T. Fennell ◽

...

Keyword(s):

Electric Field ◽

X Ray ◽

Field Control

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In situinvestigation of the non-linear optical crystal rubidium titanyl arsenate, RbTiOAsO4, under applied electric field using X-ray imaging

Journal of Applied Crystallography ◽

10.1107/s0021889807011569 ◽

2007 ◽

Vol 40 (3) ◽

pp. 505-512 ◽

Cited By ~ 1

Author(s):

D. Walker ◽

P. A. Thomas ◽

P. Pernot-Rejmánková ◽

J. Baruchel

Keyword(s):

Electric Field ◽

Electric Fields ◽

Surface Region ◽

Uniform Field ◽

Linear Optics ◽

Near Surface ◽

X Ray ◽

Non Linear ◽

Linear Optical ◽

Section Topography

Recent work on the non-linear optical single-crystal rubidium titanyl arsenate (RbTiOAsO4, RTA) has shown that it exhibits behaviour consistent with a ferroelectric semiconductor under large applied electric fields, with the development of a non-uniform field in the near-surface region. To confirm aspects of the proposed model, the behaviour of 001 slices of initially single-domain RTA, patterned with periodic Ag electrodes of spacing 38 µm, as for periodic poling in non-linear optics, were investigated using synchrotron X-ray section topography with the electric field appliedin situwhile under X-ray illumination at the ID19 topography beamline of the ESRF, Grenoble. The results of white-beam section topography as both a function of crystal to film distance, and under DC voltage are reported, confirming that there is a bending of the planes in the near-surface region. The strain in the near-surface region was examined directly using high-resolution monochromatic X-ray section topography. This revealed an extensive strain of 3 (±1) × 10−4at 1 kV, indicating that the electrostrictive coefficient, γ3333, in RTA is positive in sign.

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Electric-Field Control of Magnetism in Complex Oxide Thin Films

MRS Bulletin ◽

10.1557/mrs2008.224 ◽

2008 ◽

Vol 33 (11) ◽

pp. 1047-1050 ◽

Cited By ~ 38

Author(s):

Nicola A. Spaldin ◽

R. Ramesh

Keyword(s):

Thin Films ◽

Electric Field ◽

Electric Fields ◽

Magnetic Behavior ◽

Complex Oxide ◽

Future Research ◽

Oxide Thin Films ◽

Field Control ◽

Magnetoelectric Response ◽

Review Current

AbstractIn this article, we review current research efforts to control the magnetic behavior of complex oxide thin films using electric fields. After providing fundamental definitions of magnetoelectric response, we survey materials, architectures, and mechanisms that exhibit promise for such electric-field control of magnetism. Finally, we mention ideas for future research and discuss prospects for the field.

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Electric-field control of field-free spin-orbit torque switching via laterally modulated Rashba effect in Pt/Co/AlOx structures

Nature Communications ◽

10.1038/s41467-021-27459-2 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Min-Gu Kang ◽

Jong-Guk Choi ◽

Jimin Jeong ◽

Jae Yeol Park ◽

Hyeon-Jong Park ◽

...

Keyword(s):

Electric Field ◽

Coupling Effect ◽

Spin Orbit ◽

Rashba Effect ◽

Oxide Interface ◽

Electrical Control ◽

Perpendicular Magnetization ◽

Field Control ◽

Out Of Plane ◽

Logic Operations

AbstractSpin-orbit coupling effect in structures with broken inversion symmetry, known as the Rashba effect, facilitates spin-orbit torques (SOTs) in heavy metal/ferromagnet/oxide structures, along with the spin Hall effect. Electric-field control of the Rashba effect is established for semiconductor interfaces, but it is challenging in structures involving metals owing to the screening effect. Here, we report that the Rashba effect in Pt/Co/AlOx structures is laterally modulated by electric voltages, generating out-of-plane SOTs. This enables field-free switching of the perpendicular magnetization and electrical control of the switching polarity. Changing the gate oxide reverses the sign of out-of-plane SOT while maintaining the same sign of voltage-controlled magnetic anisotropy, which confirms the Rashba effect at the Co/oxide interface is a key ingredient of the electric-field modulation. The electrical control of SOT switching polarity in a reversible and non-volatile manner can be utilized for programmable logic operations in spintronic logic-in-memory devices.

Download Full-text