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Metallic Solids

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....

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Updated: Dec 2, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

Exploring the First High-Entropy Thin Film Libraries: Composition Spread-Controlled Crystalline Structure.

Thi Xuyen Nguyen¹, Yen-Hsun Su¹, Jason Hattrick-Simpers²

¹Department of Materials Science and Engineering, National Cheng Kung University, Tainan 70101, Taiwan.

ACS Combinatorial Science

|November 4, 2020

Summary

High-entropy oxides (HEOs) thin films were created and analyzed. Researchers discovered specific compositions and conditions that control the crystalline structure of these novel materials.

Keywords:

combinatorial sputter deposition composition-controlled crystalline structure high-entropy oxide high-throughput analysis

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Last Updated: Dec 2, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

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Published on: May 29, 2018

Achieving Efficient Fragment Screening at XChem Facility at Diamond Light Source

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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films

Published on: December 4, 2014

Area of Science:

Materials Science
Solid State Chemistry
Thin Film Deposition

Background:

High-entropy oxides (HEOs) are advanced materials with unique properties due to their complex compositions.
Understanding the relationship between composition and structure in HEOs is crucial for developing new functional materials.
Combinatorial synthesis and high-throughput characterization enable rapid exploration of HEO phase diagrams.

Purpose of the Study:

To deposit and characterize thin films of two distinct high-entropy oxide systems: (MgZnMnCoNi)Ox and (CrFeMnCoNi)Ox.
To investigate the influence of elemental composition on the crystalline structure and electrical conductivity of these HEOs.
To establish composition-controlled structure-property relationships in HEO thin films.

Main Methods:

Combinatorial sputter deposition was used to create HEO thin films on silicon wafers.
High-throughput analytical techniques were employed for characterization across large compositional ranges.
Density functional theory calculations were performed to support experimental findings.

Main Results:

Microstructure, composition, and electrical conductivity maps were generated for the HEOs.
The crystalline structure was found to be dependent on specific metallic elements within the compositions.
(MgZnMnCoNi)Ox formed a single spinel structure under certain conditions, while (CrFeMnCoNi)Ox consistently exhibited two-phase structures.

Conclusions:

Experimental demonstration of composition-controlled crystalline structure in HEOs.
Validation of findings through density functional theory calculations.
Opens pathways for designing HEOs with tailored microstructures and properties.