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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains

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Published on: July 20, 2022

Reconfigurable All-Nitride Magneto-Ionics.

Zhijie Chen¹, Christopher J Jensen^1,2, Chen Liu³

¹Physics Department, Georgetown University, Washington, District of Columbia 20057, United States.

|May 7, 2025

Summary

This study introduces a novel magneto-ionic system using manganese nitrides for energy-efficient data storage. It demonstrates reversible magnetic phase transitions controlled by nitrogen ion movement, crucial for advanced computing applications.

Keywords:

Mn4N antiperovskite exchange bias magneto-ionics manganese nitride voltage control of magnetism

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Published on: November 24, 2016

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Generative AI advancements drive demand for energy-efficient data storage.
Magneto-ionics offers a promising route for low-power magnetic property modulation.
Existing magneto-ionic systems often lack CMOS compatibility and large effect sizes.

Purpose of the Study:

To develop a CMOS-compatible solid-state magneto-ionic system using all-manganese nitrides.
To investigate the control of magnetic phase transitions via ionic motion.
To demonstrate tunable magnetic properties for energy-efficient data storage.

Main Methods:

Fabrication of an all-Mn-nitride solid-state magneto-ionic device.
Induction of nitrogen ionic motion using electric fields.
Characterization of magnetic phase transitions (ferrimagnetic to antiferromagnetic).
Measurement of exchange bias and saturation magnetization changes.

Main Results:

Nitrogen ion motion induces reversible ferrimagnetic-antiferromagnetic phase transitions in Mn nitrides.
Exchange bias effect can be increased by over an order of magnitude with nitrogen incorporation.
Post-annealing reduces exchange bias by over 70% by removing nitrogen.
Voltage-induced ion motion causes reversible changes in saturation magnetization (23%) and exchange bias (16% at 5 K).

Conclusions:

The all-Mn-nitride system is a viable, sustainable platform for tunable magnetic properties.
Demonstrates energy-efficient operation and potential for magnetic field immunity.
Highlights potential for advanced, low-power data storage solutions compatible with existing semiconductor technology.