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Updated: Jul 12, 2025

Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
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Increasing the Magnetic Order Temperature in Co3O2BO3:In Ludwigite.

Davor L Mariano1, Dalber Ruben S Candela2, Daniele C Freitas2

  • 1Instituto de Física, Universidade Federal do Rio de Janeiro (UFRJ), Av. Athos da Silveira Ramos 149, Cidade Universitária, 21941-909 Rio de Janeiro, Rio de Janeiro, Brazil.

Inorganic Chemistry
|October 23, 2023
PubMed
Summary
This summary is machine-generated.

Doping cobalt borate ludwigite with indium ions enhances magnetic interactions, increasing the magnetic ordering temperature. This study explores how nonmagnetic doping affects magnetic properties and spin states in these materials.

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Area of Science:

  • Solid State Chemistry
  • Magnetism
  • Materials Science

Background:

  • Homometallic Co3O2BO3 ludwigite exhibits magnetic planes separated by nonmagnetic low-spin Co3+ ions below 42 K.
  • Nonmagnetic ion substitution can enhance magnetic interactions but may lead to magnetic frustration depending on the dopant's spin state.
  • Understanding doping effects is crucial for tuning magnetic properties of ludwigite compounds.

Purpose of the Study:

  • To investigate the impact of nonmagnetic In3+ doping on the magnetic properties of Co3O2BO3.
  • To analyze the spin states of cobalt ions and their distribution upon doping.
  • To determine the magnetic ordering temperature and magnetic behavior of the doped material.

Main Methods:

  • Synthesis and characterization of In3+-doped Co3O2BO3.
  • Magnetic susceptibility and magnetization measurements.
  • Specific heat measurements.

Main Results:

  • In3+ ions preferentially occupy specific sites and are randomly distributed.
  • The two-dimensional magnetic character is preserved, and the magnetic transition temperature increases to 47.8 K.
  • Metamagnetic transitions and ferrimagnetic ordering are observed, consistent with the presence of high-spin Co2+ and Co3+.

Conclusions:

  • Doping Co3O2BO3 with In3+ enhances magnetic ordering temperature by promoting high-spin states.
  • The study clarifies the role of nonmagnetic dopants in modulating magnetic interactions and spin states in ludwigite structures.
  • Results provide insights into the effects of doping with various nonmagnetic +3 ions on Co3O2BO3.