Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Model for vacancy-induced d0 ferromagnetism in oxide compounds.

Georges Bouzerar1, Timothy Ziman

  • 1Laboratoire Louis Néel, CNRS, 25 avenue des Martyrs, Boîte Postale 166 38042 Grenoble Cedex 09, France. georges.bouzerar@grenoble.cnrs.fr

Physical Review Letters
|June 29, 2006
PubMed
Summary

This study introduces a new model for vacancy-induced ferromagnetism, predicting high Curie temperatures above room temperature with few parameters. It suggests nonmagnetic host doping as a method to control defects and enhance ferromagnetism in materials like HfO2 and ZrO2.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Flux-induced strengthening of the magnetic couplings in a flat-band diamond chain.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Engineering flux-controlled flat bands and topological states in a Stagome lattice.

Journal of physics. Condensed matter : an Institute of Physics journal·2025
Same author

Author Correction: Record thermopower found in an IrMn-based spintronic stack.

Nature communications·2020
Same author

Record thermopower found in an IrMn-based spintronic stack.

Nature communications·2020
Same author

Sign change of the spin Hall effect due to electron correlation in nonmagnetic CuIr alloys.

Physical review letters·2015
Same author

Temperature can enhance coherent oscillations at a Landau-Zener transition.

Physical review letters·2011

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Chemistry

Background:

  • Ferromagnetism in oxides is often linked to defects, but controlling these intrinsic defects is challenging.
  • Understanding the fundamental mechanisms of vacancy-induced magnetism is crucial for developing new magnetic materials.

Purpose of the Study:

  • To develop a simplified yet accurate model for vacancy-induced ferromagnetism.
  • To investigate the role of cation vacancies and electron correlation in inducing magnetic moments.
  • To predict conditions for achieving high Curie temperatures and propose methods for defect control.

Main Methods:

  • A correlated model for oxygen orbitals with random potentials was employed to represent cation vacancies.
  • Exact treatment of randomness was used to calculate magnetic couplings, Curie temperature, and spin/charge densities.

Related Experiment Videos

  • Systematic variation of potential, vacancy density, and correlation strength was performed.

    • Main Results:

    • Moments were observed to appear on oxygen sites near cation vacancies under specific potential conditions.
    • Calculated magnetic couplings and Curie temperatures were found to be sensitive to potential, vacancy density, and correlation strength.
    • The model predicts Curie temperatures well above room temperature for small vacancy concentrations with physically reasonable parameters.

    Conclusions:

    • The proposed model offers a parameter-efficient approach to understanding and predicting vacancy-induced ferromagnetism.
    • High Curie temperatures are achievable at low vacancy concentrations, suggesting potential for room-temperature applications.
    • Nonmagnetic host doping is proposed as a viable strategy to circumvent intrinsic defect control issues in materials like HfO2 and ZrO2.