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Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers

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Identifying magnetic phases in chemically ordered and disordered FeAl thin films.

A Zarzycki¹, M S Anwar², R Bali²

¹Institute of Nuclear Physics Polish Academy of Sciences Radzikowskiego 152 31-342 Krakow Poland.

|November 19, 2024

Summary

This summary is machine-generated.

Direct magnetic writing creates distinct nanoscale magnetic phases in Fe60Al40 films. These phases exhibit unique magnetic properties, including exchange-spring behavior and spin-glass characteristics at low temperatures, crucial for spintronic devices.

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Published on: June 7, 2018

Area of Science:

Materials Science
Condensed Matter Physics
Nanotechnology

Background:

Direct magnetic writing offers a novel approach for fabricating nanoscale elements for data storage and spintronics.
Fe60Al40 thin films exhibit distinct magnetic phases upon local chemical disordering, creating nanoscale regions with varying magnetization and coercivity.

Purpose of the Study:

To investigate the magnetic properties and interaction mechanisms of coexisting nanoscale magnetic phases in Fe60Al40 thin films.
To understand the influence of chemical ordering on the magnetic behavior of these films for potential spintronic applications.

Main Methods:

Fabrication of Fe60Al40 thin films.
Inducing local chemical disordering via irradiation to create distinct magnetic phases (non-irradiated ferromagnetic area - NIFM and irradiated ferromagnetic area - IMF).
Characterization of magnetic properties and interaction mechanisms between coexisting phases.

Main Results:

Adjacent nanoscale regions with different magnetic properties (low-magnetization/high-coercive NIFM and high-magnetization/low-coercive IMF) were formed.
Evidence of exchange-spring behavior was observed, although direct exchange coupling was generally absent.
Both magneto-structural phases displayed spin-glass-like properties at low temperatures.

Conclusions:

Chemical ordering significantly influences the magnetic properties of Fe60Al40 films.
The observed magnetic behaviors, including exchange-spring and spin-glass properties, are critical for advancing spintronic device functionality.
Controllable magnetic properties in alloys are achievable through understanding and manipulating chemical ordering.