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Related Experiment Video

Updated: Jun 16, 2026

Sputter Growth and Characterization of Metamagnetic B2-ordered FeRh Epilayers
12:20

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Published on: October 5, 2013

High-k Hf-based layers grown by RF magnetron sputtering.

L Khomenkova1, C Dufour, P-E Coulon

  • 1CIMAP, UMR CEA/CNRS/ENSICAEN/Université de Caen, Caen, France. larysa.khomenkova@ensicaen.fr

Nanotechnology
|February 4, 2010
PubMed
Summary

Silicon incorporation enhances the structural stability of HfO(2) layers, enabling amorphous structures up to 1000°C. This control over phase transitions is key for advanced material applications.

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Area of Science:

  • Materials Science
  • Thin Film Technology
  • Solid State Chemistry

Background:

  • Hafnium oxide (HfO2)-based layers are crucial in microelectronics and optics.
  • Controlling the amorphous-crystalline phase transition is vital for layer stability and performance.
  • RF magnetron sputtering is a common technique for fabricating these layers.

Purpose of the Study:

  • To investigate the structural and chemical properties of Hf-based layers.
  • To understand the influence of deposition and annealing parameters on phase transitions.
  • To determine the role of silicon incorporation in HfO2 layer stability.

Main Methods:

  • X-ray diffraction (XRD) for structural analysis.
  • Transmission electron microscopy (TEM) for microstructure examination.
  • Attenuated total reflection infrared spectroscopy (ATR-IR) for chemical bonding.

Main Results:

  • Deposition and post-deposition conditions effectively control the amorphous-crystalline phase transition temperature.
  • Silicon incorporation into the HfO2 matrix significantly enhances structural stability.
  • Amorphous HfO2-based layers with silicon retained their structure after annealing up to 900-1000°C.
  • The film/substrate interfacial layer thickness was reduced to 1 nm with silicon incorporation.

Conclusions:

  • Silicon incorporation is a key factor for achieving thermally stable amorphous HfO2-based layers.
  • Optimized deposition and annealing strategies allow precise control over phase transitions.
  • These findings are significant for developing robust HfO2-based thin films for demanding applications.