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Structural phase transformations in annealed Pt/Mn/Fe trilayers.

I O Kruhlov1, O V Shamis1, N Y Schmidt2

  • 1Metal Physics Department, National Technical University of Ukraine, 'Igor Sikorsky Kyiv Polytechnic Institute', Prospect Peremogy 37, 03056 Kyiv, Ukraine.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|May 13, 2020
PubMed
Summary
This summary is machine-generated.

Annealing Pt/Mn/Fe thin films creates new phases. The study reveals antiferromagnetic L10-MnPt and ferromagnetic L12-Fe3Pt phases, crucial for spintronic applications.

Keywords:
Fe3PtL10-FeMnPtL10-MnPtchemical orderingmagnetic thin filmssolid state reactions

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Pt/Mn/Fe thin films are promising for spintronic devices.
  • Understanding phase transitions is key to optimizing material properties.

Purpose of the Study:

  • To investigate thermally-activated phase transitions in Pt/Mn/Fe thin films.
  • To characterize the resulting phases and their potential for spintronics.

Main Methods:

  • X-ray diffraction
  • Transmission electron microscopy
  • Secondary neutral mass spectrometry depth profiling
  • Atomic force microscopy
  • Magnetic properties measurements
  • Vacuum annealing up to 620 °C

Main Results:

  • Formation of L10-MnPt at 280 °C-450 °C.
  • Transformation of metastable bcc Fe3Pt to fcc Fe3Pt and then to L12-Fe3Pt with increasing temperature.
  • Final product at 620 °C includes antiferromagnetic L10-MnPt and ferromagnetic L12-Fe3Pt.

Conclusions:

  • Annealing induces distinct phase transitions in Pt/Mn/Fe films.
  • The resulting L10-MnPt and L12-Fe3Pt phases are suitable for spintronic applications.