Magnetic diode at $T$ = 300 K

TL;DR

This study discovers a magnetic diode effect at room temperature in a two-dimensional artificial permalloy honeycomb lattice, showing unidirectional electronic transport without magnetic field influence, with potential implications for spintronics.

Contribution

It reports the first observation of a magnetic diode effect in a 2D artificial honeycomb lattice at room temperature, highlighting magnetic charge's role in unidirectional transport.

Findings

Unidirectional transport persists at 300 K.

Colossal differential conductivity enhancement observed.

Behavior occurs without external magnetic field.

Abstract

We report the finding of unidirectional electronic properties, analogous to a semiconductor diode, in two-dimensional artificial permalloy honeycomb lattice of ultra-small bond, with a typical length of ~ 12 nm. The unidirectional transport behavior, characterized by the asymmetric colossal enhancement in differential conductivity at a modest current application of ~ 10-15 $\mu$A, persists to T = 300 K in honeycomb lattice of thickness ~ 6 nm. The asymmetric behavior arises without the application of magnetic field. A qualitative analysis of experimental data suggests the role of magnetic charge or monopoles in the unusual observations with strong implication for spintronics.