Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

George Yumnam; Jiasen Guo; Yiyao Chen; Ashutosh Dahal; Pousali Ghosh; Quinn Cunningham; Jong Keum; Valeria Lauter; Amjed Abdullah; Mahmoud Almasri; Deepak K. Singh

doi:10.1016/j.mtphys.2021.100574

Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

George Yumnam, Jiasen Guo, Yiyao Chen, Ashutosh Dahal, Pousali Ghosh, Quinn Cunningham, Jong Keum, Valeria Lauter, Amjed Abdullah, Mahmoud Almasri, Deepak K. Singh

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Spin diode is important prerequisite to practical manifestation of spin electronics. Yet, a functioning magnetic diode at room temperature is still illusive. Here, we reveal diode-type phenomena due to magnetic charge mediated conduction in artificial honeycomb geometry, made of concave shape single domain permalloy element. We find that honeycomb lattice defies symmetry by populating vertices with low and high multiplicity magnetic charges, causing asymmetric magnetization, in applied current of opposite polarity. High multiplicity units create highly resistive network, thereby inhibiting magnetic charge dynamics propelled electrical conduction. However, practical realization of this effect requires modest demagnetization factor in constituting element. Concave structure fulfills the condition. Subsequently, magnetic diode behavior emerges across broad thermal range of T = 40 K–300 K. The finding is a departure from the prevailing notion of spin-charge interaction as the sole guiding principle behind spintronics. Consequently, a new vista, mediated by magnetic charge interaction, is envisaged for spintronic research.

Original language	English
Article number	100574
Journal	Materials Today Physics
Volume	22
DOIs	https://doi.org/10.1016/j.mtphys.2021.100574
State	Published - Jan 2022

Funding

We thank T. Charlton and G. Vignale for help with neutron scattering experiments and theoretical discussion. DKS thankfully acknowledges the support by US Department of Energy , Office of Science , Office of Basic Energy Sciences under the grant no. DE-SC0014461 . This work utilized the facilities supported by the Office of Basic Energy Sciences , US DOE .

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences	DE-SC0014461

Keywords

Artificial magnetic honeycomb lattice
Magnetic charge dynamics
Magnetic diode
Spintronics

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10.1016/j.mtphys.2021.100574

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title = "Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice",

abstract = "Spin diode is important prerequisite to practical manifestation of spin electronics. Yet, a functioning magnetic diode at room temperature is still illusive. Here, we reveal diode-type phenomena due to magnetic charge mediated conduction in artificial honeycomb geometry, made of concave shape single domain permalloy element. We find that honeycomb lattice defies symmetry by populating vertices with low and high multiplicity magnetic charges, causing asymmetric magnetization, in applied current of opposite polarity. High multiplicity units create highly resistive network, thereby inhibiting magnetic charge dynamics propelled electrical conduction. However, practical realization of this effect requires modest demagnetization factor in constituting element. Concave structure fulfills the condition. Subsequently, magnetic diode behavior emerges across broad thermal range of T = 40 K–300 K. The finding is a departure from the prevailing notion of spin-charge interaction as the sole guiding principle behind spintronics. Consequently, a new vista, mediated by magnetic charge interaction, is envisaged for spintronic research.",

keywords = "Artificial magnetic honeycomb lattice, Magnetic charge dynamics, Magnetic diode, Spintronics",

author = "George Yumnam and Jiasen Guo and Yiyao Chen and Ashutosh Dahal and Pousali Ghosh and Quinn Cunningham and Jong Keum and Valeria Lauter and Amjed Abdullah and Mahmoud Almasri and Singh, {Deepak K.}",

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doi = "10.1016/j.mtphys.2021.100574",

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AU - Yumnam, George

AU - Guo, Jiasen

AU - Chen, Yiyao

AU - Dahal, Ashutosh

AU - Ghosh, Pousali

AU - Cunningham, Quinn

AU - Keum, Jong

AU - Lauter, Valeria

AU - Abdullah, Amjed

AU - Almasri, Mahmoud

AU - Singh, Deepak K.

PY - 2022/1

Y1 - 2022/1

N2 - Spin diode is important prerequisite to practical manifestation of spin electronics. Yet, a functioning magnetic diode at room temperature is still illusive. Here, we reveal diode-type phenomena due to magnetic charge mediated conduction in artificial honeycomb geometry, made of concave shape single domain permalloy element. We find that honeycomb lattice defies symmetry by populating vertices with low and high multiplicity magnetic charges, causing asymmetric magnetization, in applied current of opposite polarity. High multiplicity units create highly resistive network, thereby inhibiting magnetic charge dynamics propelled electrical conduction. However, practical realization of this effect requires modest demagnetization factor in constituting element. Concave structure fulfills the condition. Subsequently, magnetic diode behavior emerges across broad thermal range of T = 40 K–300 K. The finding is a departure from the prevailing notion of spin-charge interaction as the sole guiding principle behind spintronics. Consequently, a new vista, mediated by magnetic charge interaction, is envisaged for spintronic research.

AB - Spin diode is important prerequisite to practical manifestation of spin electronics. Yet, a functioning magnetic diode at room temperature is still illusive. Here, we reveal diode-type phenomena due to magnetic charge mediated conduction in artificial honeycomb geometry, made of concave shape single domain permalloy element. We find that honeycomb lattice defies symmetry by populating vertices with low and high multiplicity magnetic charges, causing asymmetric magnetization, in applied current of opposite polarity. High multiplicity units create highly resistive network, thereby inhibiting magnetic charge dynamics propelled electrical conduction. However, practical realization of this effect requires modest demagnetization factor in constituting element. Concave structure fulfills the condition. Subsequently, magnetic diode behavior emerges across broad thermal range of T = 40 K–300 K. The finding is a departure from the prevailing notion of spin-charge interaction as the sole guiding principle behind spintronics. Consequently, a new vista, mediated by magnetic charge interaction, is envisaged for spintronic research.

KW - Artificial magnetic honeycomb lattice

KW - Magnetic charge dynamics

KW - Magnetic diode

KW - Spintronics

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Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

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