Special Issue "Single Crystal Growth of Metal Oxides"

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: 10 August 2020.

Special Issue Editor

Dr. Dmitry A. Shulyatev

Guest Editor
Materials Modeling and Development Laboratory, National University of Science and Technology MISIS, Moscow 119049, Russia
Interests: crystal growth and characterization; floating zone melting; perovskites; high Tc superconductivity; magnetoresistivity; quasicrystals

Special Issue Information

Dear Colleagues,

Metal oxide (MO) compounds are a broad class of materials that has attracted much attention due to their potential for technological applications and their variety of physical properties, which are vital for fundamental research. For research purposes and many applications, high quality artificially grown MO single crystals of essential.

The specific features of single MO crystals grown using different techniques demonstrate strong deviation from stoichiometry and compositional inhomogeneity. The grown single crystals may contain a huge amount of cationic or oxygen vacancies. In many complex oxides, i.e., oxides that contain two or more metals, change in the element distribution along the growth direction was observed. The compositional inhomogeneity as well as structural defects (vacancies, impurities, sub-grain boundaries) may strongly influence the physical properties of the metal oxide compounds. The question about the intrinsic and extrinsic properties of these materials has arisen. For this reason, chemical inhomogeneity and the defect structure of MO single crystals must be studied t search for optimum growth conditions for the growth of high-q uality crystals.

This Special Issue focuses on bulk MO single crystals growth. The possible topics include but are not limited to:

  • Mechanism of crystal growth
  • Growth conditions and quality of the resulting crystals
  • Characterization of the grown single crystals
  • Defect structure and compositional inhomogeneity
  • Modeling and theory of growth

Both reviews and original research articles on MO single crystals growth are welcome. We are looking forward to your participation in this Special Issue.

Dr. Dmitry A. Shulyatev
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Metal oxides
  • Single crystal
  • Crystal growth and characterization
  • Defect structure
  • Compositional inhomogeneity

Published Papers (1 paper)

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Research

Open AccessArticle
Oxygen Inhomogeneity and Reversibility in Single Crystal LaNiO3−δ
Crystals 2020, 10(7), 557; https://doi.org/10.3390/cryst10070557 - 30 Jun 2020
Abstract
LaNiO3−δ single crystals have been obtained via high pressure floating zone growth under 149 bar of oxygen pressure. We find a radial gradient in the magnetic properties of specimens extracted from the as-grown boule, which we correlate with the appearance of [...] Read more.
LaNiO3−δ single crystals have been obtained via high pressure floating zone growth under 149 bar of oxygen pressure. We find a radial gradient in the magnetic properties of specimens extracted from the as-grown boule, which we correlate with the appearance of ordered oxygen vacancy structures. This radial oxygen inhomogeneity has been characterized systematically using a combination of magnetization and X-ray scattering measurements. We establish the presence of rhombohedral ( R 3 ¯ c ), oxygen stoichiometric specimens at the periphery of the boule and the presence of a dilute concentration of ordered oxygen-deficient orthorhombic La2Ni2O5 in the center. Furthermore, we demonstrate that the as-grown, oxygen-deficient central regions of the crystal can be annealed under high oxygen pressure, without loss of crystallinity, into fully oxygenated LaNiO3, recovering magnetic properties that are characteristic of stoichiometric specimens from the exterior region of the crystal. Thus, single crystals of LaNiO3−δ possess oxygen content that can be reversibly modified under oxidizing and reducing conditions. Full article
(This article belongs to the Special Issue Single Crystal Growth of Metal Oxides)
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