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Ferromagnetism

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

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Related Experiment Video

Updated: Jan 12, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

Published on: March 24, 2019

Spin currents and torques in ferromagnetic systems with strong interfacial spin-orbit coupling.

Nils Petter Jørstad^1,2, Bernhard Pruckner^3,4, Wolfgang Goes⁵

¹Christian Doppler Laboratory for Nonvolatile Magnetoresistive Memory and Logic, Vienna, Austria. jorstad@iue.tuwien.ac.at.

Scientific Reports

|November 5, 2025

Summary

This study describes spin-dependent current transport across interfaces, explaining current-induced torques on magnetization. It reproduces spin-orbit torque angular dependence, crucial for spintronic device miniaturization.

Keywords:

Ferromagnetic trilayers Rashba-Edelstein effect Spin currents Spin-orbit coupling Spin-orbit torque

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Last Updated: Jan 12, 2026

Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope

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Published on: March 24, 2019

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Area of Science:

Condensed Matter Physics
Materials Science
Spintronics

Background:

Understanding spin-dependent transport at interfaces is key for spintronic devices.
Interfacial spin-orbit coupling significantly influences magnetization dynamics.

Purpose of the Study:

To present a 3D model of spin-dependent current transport across nonmagnetic/ferromagnetic interfaces.
To investigate current-induced torques and their angular dependence.
To explore mechanisms for field-free switching in spintronic devices.

Main Methods:

Developed a three-dimensional model incorporating magnetic exchange and Rashba spin-orbit interactions.
Analyzed spin-dependent current transport across Pt/Co and Ta/CoFeB interfaces.
Investigated spin currents generated through spin-orbit precession and filtering.

Main Results:

Successfully reproduced the angular dependence of spin-orbit torques in Pt/Co and Ta/CoFeB systems.
Identified the Rashba-Edelstein effect as the driver of field-like torque.
Demonstrated the generation of all three spin-polarization components based on magnetization direction.

Conclusions:

The interplay between magnetic exchange and spin-orbit interactions dictates torque behavior.
Mechanisms explored could enable field-free switching for advanced spintronic devices.
Findings are crucial for the miniaturization of spintronic technologies.