Field and temperature tuning of magnetic diode in permalloy honeycomb lattice

TL;DR

This study investigates how temperature and magnetic fields influence the magnetic diode behavior in a permalloy honeycomb lattice, revealing persistent diode effects and reentrant behavior that could advance spintronic device development.

Contribution

It provides a comprehensive analysis of temperature and magnetic field effects on magnetic diode behavior in 2D permalloy honeycomb lattices, highlighting reentrant phenomena and magnetic charge interactions.

Findings

Magnetic diode persists across a broad temperature range.

Reentrant diode behavior observed after warming to room temperature.

Energy gap estimated at 0.03-0.1 eV related to magnetic Coulomb interactions.

Abstract

The observation of magnetic diode behavior with ultra-low forward voltage of 5 mV renders new venue for energetically efficient spintronic device research in the unconventional system of two-dimensional permalloy honeycomb lattice. Detailed understanding of temperature and magnetic field tuning of diode behavior is imperative to any practical application. Here, we report a comprehensive study in this regard by performing electrical measurements on magnetic diode sample as functions of temperature and magnetic field. Magnetic diode is found to persist across the broad temperature range. Magnetic field application unveils a peculiar reentrant characteristic where diode behavior is suppressed in remnant field but reappears after warming to room temperature. Analysis of I-V data suggests a modest energy gap, 0.03-0.1 eV, which is comparable to magnetic Coulomb's interaction energy between emergent magnetic charges on honeycomb vertices in the reverse biased state. It affirms the role of magnetic charge correlation in unidirectional conduction in 2D honeycomb lattice. The experimental results are expected to pave way for the utilization of magnetic diode in next generation spintronic device applications.