Subsystem domination influence on magnetization reversal in designed magnetic patterns in ferrimagnetic Tb/Co
Łukasz Frąckowiak1, Feliks Stobiecki2, Gabriel David Chaves-O'Flynn2
1Institute of Molecular Physics, Polish Academy of Sciences, Poznań, Poland. lukasz.frackowiak@ifmpan.poznan.pl.
Scientific Reports
|January 14, 2021
Summary
Helium ion bombardment tailors Tb/Co ferrimagnetic multilayers, creating unique lattices. These structures enable stable domain patterns without domain walls, offering novel magnetic behavior.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Ferrimagnetic multilayers, such as Tb/Co, exhibit complex magnetic properties.
- Tailoring these properties is crucial for advanced magnetic device applications.
- Ion bombardment offers a method for nanoscale modification of magnetic materials.
Purpose of the Study:
- To investigate the effects of Helium ion (He+) bombardment on Tb/Co ferrimagnetic multilayers.
- To explore the formation of novel magnetic domain structures.
- To understand the magnetization reversal mechanisms in engineered multilayers.
Main Methods:
- Fabrication of Tb/Co ferrimagnetic multilayers.
- Controlled He+ ion bombardment to create patterned magnetic lattices.
- Magnetic characterization techniques to study magnetization reversal.
Main Results:
- He+ ion bombardment allows for the precise tailoring of Tb/Co ferrimagnetic multilayers.
- Two types of lattices were created, one exhibiting standard magnetic domain behavior and another allowing for domain creation without domain walls.
- These unique domain patterns are highly stable due to reduced demagnetizing and domain wall energies.
- Magnetization reversal occurs via domain wall propagation or nucleation and propagation.
Conclusions:
- He+ ion bombardment is an effective technique for engineering the magnetic properties of Tb/Co multilayers.
- The creation of stable, domain-wall-free magnetic patterns is achievable.
- These findings open possibilities for novel magnetic storage and spintronic devices.
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