Ce-Doping and Reduction Annealing Effects on Magnetic Properties of Pr2-xCexCuO4 Nanoparticles

Malik Anjelh Baqiya, Putu Eka Dharma Putra, Bambang Triono, Resky Irfanita, S. Suasmoro, D. Darminto, Takayuki Kawamata, Takashi Noji, Hidetaka Sato, Masatsune Kato, Yoji Koike

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Magnetic properties of reduced T’-Pr2-xCexCuO4 (T’-PCCO) nanoparticles with x = 0, 0.10, and 0.15 have been investigated. The T’-PCCO samples were synthesized by the chemically dissolved method with HNO3 as dissolving agents and by the succeeding calcination at 1000 °C for 15 h in air. The reduced T’-PCCO samples were obtained by the reduction annealing at 700 °C for 10 h in Argon atmosphere and at 700 °C for 12 h in vacuum. Rietveld analyses of the X-ray diffraction (XRD) patterns for all the samples have revealed dependences of the c-axis length and the crystal size on the Ce doping and the reduction annealing. XRD analyses and transmission electron microscopy (TEM) images have confirmed T’-PCCO nanoparticles with the size of around 40–100 nm. Magnetic properties of all the T’-PCCO nanoparticles were studied by a superconducting quantum interference device (SQUID) showing a dominant paramagnetic feature with very weak ferromagnetism in the as-synthesized samples at room temperature. It has changed to a pure paramagnetic feature after the reduction annealing in argon atmosphere and an enhanced ferromagnetism through vacuum annealing. This is probably due to the change in the number of oxygen vacancies through the defect recovery and the removal of excess oxygen after both reduction annealing processes, respectively.

Original languageEnglish
Pages (from-to)2165-2174
Number of pages10
JournalJournal of Superconductivity and Novel Magnetism
Volume32
Issue number7
DOIs
Publication statusPublished - 2019 Jul 15

Keywords

  • Crystal defect
  • Oxygen vacancy
  • PCCO
  • Paramagnetic
  • Weak ferromagnetism

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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