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Gas-phase synthesis and magnetism of HfO2 nanoclusters

  • Kang-Qi Lin
  • Lai-Sen Wang
  • Zhen-Wei Wang
  • Rui-Tao Wen
  • Yuanzhi Chen
  • Dong-Liang PengEmail author
Regular Article
  • 233 Downloads
Part of the following topical collections:
  1. Topical issue: ISSPIC 16 - 16th International Symposium on Small Particles and Inorganic Clusters

Abstract

Since the unexpected room-temperature ferromagnetism was found in undoped HfO2 thin film, the origin of ferromagnetism became a debatable research hotspot The HfO2 nanostructure materials prepared by traditional synthetic methods usually shows monoclinic phase. In this work, tetragonal phase HfO2 nanoclusters (NCs) with uniform morphology and diameters ranging from 7 to 12 nm were prepared via plasma gas condensation cluster beam deposition technique. By annealing at 300, 600, 800 °C in air and Ar(95%) + H2(5%) for 3 h, respectively, the HfO2 NCs gradually transformed from tetragonal phase into monoclinic phase. The magnetic measurement results showed that as-prepared HfO2 NCs with either tetragonal or monoclinic phase were paramagnetic, which is different from the diamagnetic behavior of bulk HfO2 and is also not in agreement with ferromagnetism reported in some other works.

Keywords

Hafnium Tetragonal Phase Magnetization Curve Monoclinic Phase Paramagnetic Behavior 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Kang-Qi Lin
    • 1
  • Lai-Sen Wang
    • 1
  • Zhen-Wei Wang
    • 1
  • Rui-Tao Wen
    • 1
  • Yuanzhi Chen
    • 1
  • Dong-Liang Peng
    • 1
    Email author
  1. 1.Department of Materials Science and Engineering, College of MaterialsXiamen UniversityXiamenP.R. China

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