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Crystals
Special Issues
Synthesis and Crystal Growth of Superconductors Materials
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Synthesis and Crystal Growth of Superconductors Materials

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

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 12729

Special Issue Editors

Dr. Mihai-Ionut Sturza

E-Mail Website1 Website2
Guest Editor
Leibniz Institute for Solid State and Materials Research (IFW), 01069 Dresden, Germany
Interests: synthesis and crystal growth of new inorganic materials; structural characterization; intermetallic materials; superconductivity; magnetism
Dr. Shiv J. Singh

E-Mail Website
Guest Editor
Institute of High Pressure Physics (IHPP), Polish Academy of Sciences, Sokołowska 29, 01-142 Warsaw, Poland
Interests: superconducting materials; magnetism; critical current density; upper critical fields; vortex phase diagram; applied superconductivity

Special Issue Information

Dear Colleagues,

Important developments in synthesis strategies to design and precisely assemble structures to control properties are probably the most challenging problems in modern condensed matter and materials physics. Understanding and controlling the fundamental properties of materials are critical to improving their functionality on every level. Significant progress in the physics of condensed matter was made through the discovery of interesting phenomena, including magnetism, ferroelectricity, superionicity, etc. It is apparently safe to state that “without the material there is no physics”. It is a historical case that materials leading to breakthroughs have been discovered in most cases by chance among intese research efforts undertaken with a unique but flexible view. This is particularly true for the exploration of new superconductors.

The discovery of high critical temperature superconductivity in complex metal cuprates is one of the most remarkable events in modern science. As a result of exploratory synthesis activities, partly motivated by the successes in the cuprates families, in 2008 unconventional iron-based superconductors were discovered. In recent years, beyond the cuprates and arsenides, several classes of new superconductors (borides (e.g. MgB2, RENi2B2C), stannides (e.g. Yb3Rh4Sn13, Ca3Rh4Sn13), heavy fermion (e.g. UTe2, CeCoIn5), and superhydrides (e.g. PrH9, LaH10 ) have been explored. To reveal intrinsic properties in depth and further resolve the mechanism of superconductivity, synthesizing high-quality polycrystalline or single crystals is crucial.

We kindly invite researchers to contribute to this Special Issue, which is intended to provide new insights and advances in the synthesis and characterization of superconductor materials, with certain consideration to their chemical and physical properties and crystal structure description.

The topics summarized under the keywords broadly cover examples of a great number of sub-topics. The volume is especially open for any innovative contributions involving the synthesis and crystal growth of superconductors materials.

Dr. Mihai-Ionut Sturza
Dr. Shiv J. Singh
Guest Editors

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 submissions that pass pre-check are 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 2600 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

  •  synthesis and crystal growth
  • crystal structure
  • chemical bonding
  • phase diagrams
  • superconductors
  • magnetic and electric characterization
  • superconducting properties

Published Papers (4 papers)

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Research

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11 pages, 16948 KiB  
Article
Laser-Assisted Floating Zone Growth of BaFe2S3 Large-Sized Ferromagnetic-Impurity-Free Single Crystals
by Maria Lourdes Amigó, Andrey Maljuk, Kaustuv Manna, Quirin Stahl, Claudia Felser, Christian Hess, Anja U.B. Wolter, Jochen Geck, Silvia Seiro and Bernd Büchner
Crystals 2021, 11(7), 758; https://doi.org/10.3390/cryst11070758 - 29 Jun 2021
Cited by 3 | Viewed by 2306
Abstract
The quasi-one-dimensional antiferromagnetic insulator BaFe2S3 becomes superconducting under a hydrostatic pressure of ∼10 GPa. Single crystals of this compound are usually obtained by melting and further slow cooling of BaS or Ba, Fe, and S, and are small and needle-shaped [...] Read more.
The quasi-one-dimensional antiferromagnetic insulator BaFe2S3 becomes superconducting under a hydrostatic pressure of ∼10 GPa. Single crystals of this compound are usually obtained by melting and further slow cooling of BaS or Ba, Fe, and S, and are small and needle-shaped (few mm long and 50–200 μm wide). A notable sample dependence on the antiferromagnetic transition temperature, transport behavior, and presence of superconductivity has been reported. In this work, we introduce a novel approach for the growth of high-quality single crystals of BaFe2S3 based on a laser-assisted floating zone method that yields large samples free of ferromagnetic impurities. We present the characterization of these crystals and the comparison with samples obtained using the procedure reported in the literature. Full article
(This article belongs to the Special Issue Synthesis and Crystal Growth of Superconductors Materials)
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10 pages, 2550 KiB  
Article
Single-Crystal Growth of Sr2RuO4 by the Floating-Zone Method Using an Infrared Image Furnace with Improved Halogen Lamps
by Naoki Kikugawa, Dmitry A. Sokolov, Tohru Nagasawa and Andrew P. Mackenzie
Crystals 2021, 11(4), 392; https://doi.org/10.3390/cryst11040392 - 08 Apr 2021
Cited by 4 | Viewed by 2766
Abstract
We report the single-crystal growth of the unconventional superconductor Sr2RuO4, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus [...] Read more.
We report the single-crystal growth of the unconventional superconductor Sr2RuO4, on which research has reached a turning point recently. In order to optimize the quality of crystals grown by the floating-zone method using an infrared image furnace, we focus on an improvement of the structure of the filament in the halogen lamps. By reducing the thickness of the total filament, the form of the molten zone was narrowed. More importantly, the molten zone was observed to be more stable during the growth process. Finally, we obtained the crystals with a length of 12 cm. Additionally, the grown crystal has high quality, displaying the 1.5 K transition temperature expected only for the purest crystals. We also discuss the availability of the newly developed halogen lamps. Full article
(This article belongs to the Special Issue Synthesis and Crystal Growth of Superconductors Materials)
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11 pages, 3078 KiB  
Article
Synthesis of a Metal Oxide by Forming Solvate Eutectic Mixtures and Study of Their Synthetic Performance under Hyper- and Hypo-Eutectic Conditions
by Omar Gómez Rojas, Simon R. Hall and Tadachika Nakayama
Crystals 2020, 10(5), 414; https://doi.org/10.3390/cryst10050414 - 21 May 2020
Cited by 4 | Viewed by 2660
Abstract
The synthesis of YBa2Cu3O7−x (YBCO or 123) superconductor was carried out under hyper- and hypo-eutectic conditions with different ammonium compounds, i.e., ammonium nitrate, formate, acetate, carbonate, bicarbonate, and tetramethylammonium nitrate. The aim was to find more affordable synthetic [...] Read more.
The synthesis of YBa2Cu3O7−x (YBCO or 123) superconductor was carried out under hyper- and hypo-eutectic conditions with different ammonium compounds, i.e., ammonium nitrate, formate, acetate, carbonate, bicarbonate, and tetramethylammonium nitrate. The aim was to find more affordable synthetic pathways using highly available and cheaper compounds, as well as to study the crystal formation under no-carbon conditions when ammonium nitrate was employed. Best results were obtained when eutectic conditions were achieved, namely by ammonium nitrate and YBaCu nitrates in a 5:1 molar ratio (81% of the superconductor). Ammonium formate, acetate, carbonate, and bicarbonate did not produce eutectic mixes. Temperature analysis of the reaction carried out by ammonium nitrate/YBaCu nitrates indicated the formation of barium carbonate, despite no carbon source being used in this reaction. This phenomenon is further discussed in this work. Consequently, tetramethylammonium nitrate, as a chelator and carbon source, was used, providing >96% of the superconductor. Full article
(This article belongs to the Special Issue Synthesis and Crystal Growth of Superconductors Materials)
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Review

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22 pages, 1911 KiB  
Review
Bulk and Single Crystal Growth Progress of Iron-Based Superconductors (FBS): 1111 and 1144
by Shiv J. Singh and Mihai I. Sturza
Crystals 2022, 12(1), 20; https://doi.org/10.3390/cryst12010020 - 23 Dec 2021
Cited by 11 | Viewed by 3650
Abstract
The discovery of iron-based superconductors (FBS) and their superconducting properties has generated huge research interest and provided a very rich physics high Tc family for fundamental and experimental studies. The 1111 (REFeAsO, RE = Rare earth) and 1144 (AEA [...] Read more.
The discovery of iron-based superconductors (FBS) and their superconducting properties has generated huge research interest and provided a very rich physics high Tc family for fundamental and experimental studies. The 1111 (REFeAsO, RE = Rare earth) and 1144 (AEAFe4As4, AE = Ca, Eu; A = K, Rb) families are the two most important families of FBS, which offer the high Tc of 58 K and 36 K with doping and without doping, respectively. Furthermore, the crystal growth of these families is not an easy process, and a lot of efforts have been reported in this direction. However, the preparation of high-quality and suitable-sized samples is still challenging. In this short review, we will summarize the growth of materials with their superconducting properties, especially polycrystals and single crystals, for the 1111 and 1144 families, and make a short comparison between them to understand the developmental issues. Full article
(This article belongs to the Special Issue Synthesis and Crystal Growth of Superconductors Materials)
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