  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.
