Spintronic Devices and Magnetoresistance Phenomena

Spintronic devices harness the electron’s spin degree of freedom alongside its charge to realise novel functionalities in data storage, sensing and computing. Central to this field are magnetoresistance phenomena, in which the electrical resistance of a material or heterostructure varies according to its magnetic configuration or applied field. The discovery of giant magnetoresistance in multilayer thin films led to high-sensitivity magnetic sensors and non-volatile magnetic random access memory based on tunnelling magnetoresistance in magnetic tunnel junctions. More recent innovations exploit spin–orbit coupling and interfacial spin torques, enabling current-driven manipulation of magnetisation in two-terminal devices. In parallel, topologically non-trivial spin textures such as skyrmions have emerged as compact, low-power information carriers, detectable via spin-mixing and unidirectional magnetoresistance effects. Spin-caloritronic phenomena, which convert thermal gradients into spin currents, and memristive devices exhibiting colossal magnetoresistance further broaden the landscape. Together, these advances promise low-power logic circuits, neuromorphic architectures and ultra-sensitive magnetic sensors compatible with large-scale integration and room-temperature operation.

Research from Nature Portfolio

Recent studies have demonstrated a second-order nonlinear thermoelectric effect in a superconducting heterostructure, where a MoGe film on a ferrimagnetic insulator produces a voltage proportional to the square of an applied temperature gradient. This effect enables power generation from temperature fluctuations without a net thermal bias, opening new avenues in spin-caloritronic energy harvesting. Complementary theoretical and computational work has revealed chiral spin-mixing magnetoresistance in non-collinear magnetic states. In these models, the interplay of spin–orbit coupling and magnetic chirality gives rise to a linear magnetoresistive response that can distinguish the handedness of spin-spirals and skyrmions in a two-terminal readout geometry. Such magnetoresistance modes promise simplified device architectures for all-electrical detection of topological spin textures.

Spintronic Devices and Magnetoresistance Phenomena publication trend

The graph below shows the total number of articles in spintronic devices and magnetoresistance phenomena across all publications each year (not limited to Nature Index journals).

Technical terms

Magnetoresistance: Variation of electrical resistance in response to the magnetic configuration or applied field.

Giant magnetoresistance (GMR): Large change in resistance of layered ferromagnet/non-magnet structures due to spin-dependent electron scattering.

Tunnelling magnetoresistance (TMR): Resistance change across an insulating barrier between magnetic electrodes due to spin-polarised tunnelling.

Spin Hall effect: Generation of a transverse spin current from a longitudinal charge current via spin–orbit coupling.

Skyrmion: Topologically protected, nanoscale vortex of spin moments in certain magnetic materials.

References

1. Observation of nonlinear thermoelectric effect in MoGe/Y3Fe5O12. Nature Communications (2024).
2. Electrical Detection of Magnetic Skyrmions in a Magnetic Tunnel Junction. Advanced Electronic Materials (2022).
3. Unidirectional Magnetoresistance in Antiferromagnet/Heavy-Metal Bilayers. Physical Review X (2022).
4. Realization of Zero‐Field Skyrmions in a Magnetic Tunnel Junction. Advanced Electronic Materials (2023).
5. Spin-orbit enabled all-electrical readout of chiral spin-textures. Nature Communications (2022).