Researchers Tailored Magnetic Memory With Current Pulses

Scientists successfully lowered the compensation temperature of ferrimagnetic films using spin-orbit torque.

Updated on Sept. 28, 2026 in Materials Science

Isometric editorial illustration of a layered thin-film magnetic stack, representing advanced scientific memory research. — Researchers have successfully demonstrated a method to tailor the magnetic properties of ferrimagnetic CoGd films using electrical current pulses to manipulate spin alignment. AI Illustration. Upload story photo >

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Researchers have demonstrated a new method to electrically tailor magnetic properties in CoGd films. By applying precise current pulses, the team successfully reduced the compensation temperature without altering the material's composition.

Why it matters

This technique allows for the site-specific customization of magnetic materials, a critical requirement for next-generation ferrimagnetic memory devices. By decoupling sublattices via spin-orbit torque, researchers have unlocked a new path for high-density storage.

The study involved applying 60 mA, 50 ms current pulses to Pt/IrMn3/CoGd multilayers. Effects were only observed when current density exceeded 10^11 A/m2, which created a noncollinear spiral spin configuration in the cobalt and gadolinium layers.

The players

DGIST

DGIST is a leading South Korean research institute that served as the primary institution for this study.

Shinshu University

Shinshu University is a Japanese research institution that contributed to the collaborative effort.

Vietnam National University Ho Chi Minh City

Vietnam National University Ho Chi Minh City provided additional research support for the international project.

The details

By using spin-orbit torque through a platinum layer, researchers realigned spins within the IrMn3/CoGd interface. This noncollinear spiral configuration prevents the cobalt and gadolinium sublattices from fully compensating each other, allowing for localized property control.

September 28, 2026: The research findings were published.

The Big Picture

This method replaces traditional rigid material properties with dynamically tunable states in ferrimagnetic memory devices. It shifts the discipline toward site-specific spintronic engineering rather than static manufacturing.

This breakthrough could enable more energy-efficient and scalable magnetic storage solutions for future computing hardware. By allowing engineers to tune magnetic properties on a chip, it promises to shrink components and increase data density in next-generation devices.

The takeaway

This discovery shows that electrical current can be used to precisely manipulate magnetism at the atomic scale. This development could eventually lead to faster and more reliable memory storage technologies for personal electronics.