IRG 2

Complex Metal Oxides

IRG 2 Leaders:

paul evans

Paul Evans
1105 Engineering Research Building
1500 Engineering Dr
Madison, WI 53706
608-265-6773
pgevans@wisc.edu

Jordan R. Schmidt 
Department of Chemistry
1101 University Ave
Madison, WI 53706
608-262-2996
schmidt@chem.wisc.edu

More group members

 

Complex metal oxides are a diverse and highly versatile class of materials that can exhibit scientifically and technologically important behaviors ranging from magnetism to piezoelectricity.  New technologies and new fields of applications can be realized by expanding the scope of available ionic compositions and increasing the geometric complexity of nanostructures formed from crystalline oxide materials. IRG 2 focuses on probing the synthesis of oxides, increasing the range of available oxide compositions, and forming unique nanostructures – directions that are each enabled by use of novel transformations from the amorphous to crystalline form. This process of solid phase epitaxy, or SPE, allows the crystallization of materials that cannot be made through conventional processing techniques and provides the freedom to develop new materials and explore new properties.

 

IRG 2 Highlights

  • Solid-Phase Epitaxy of Atomic Layer Deposited PrAlO3 Films Presented at APS by MRSEC Graduate Student

    Yajin Chen presented her work on the use of solid-phase epitaxy to create epitaxial complex-oxide interfaces that have promising electronic properties at the APS March Meeting 2019 in Boston, MA.

  • MRSEC Postdoc, Peng Zuo, Gives Presentation at ICCGE19

    Peng Zuo, a postdoc working in the MRSEC IRG 2, presented his group’s work on the system of PrAlO3/SrTiO3 created by solid phase epitaxy at the International Conference on Crystal Growth and Epitaxy (ICCGE-19) in …

  • Poster on Using Metadynamics to Model Complex Processes in Crystalization Earns Award for MRSEC Graduate Student

    Highlighting her recent work with the MRSEC Interdisciplinary Research Group on Complex Metal Oxides, graduate student, Tesia Janicki, brought home an award for best poster from the 51st Midwest Theoretical Chemistry Conference (MWTCC) in June. 

  • (2019) New Precursors and Growth Processes for Complex Oxide Electronic Materials

    Oxide compounds with multiple metal atoms are called complex oxides because they can have many chemical states, crystal structures, and a wide range of useful properties. Wisconsin MRSEC researchers have developed a new way to create crystals of an important series of oxides for quantum electronics, involving the lanthanide row of elements on the periodic table. The MRSEC team deposited lanthanide oxide films using a method called atomic layer deposition, using chemical precursors they developed. The resulting films are amorphous, with a disordered atomic structure, but heating them in contact with the surface of a substrate widely employed in oxide research transforms them into crystals templated by the substrate. This work required interdisciplinary collaboration among chemists, chemical engineers, and materials scientists, brought together by the MRSEC.

  • (2019) Nanoscale Control of Complex Oxide Crystallization

    Small (nanometer-sized) crystals of multi-component, complex metal oxides have useful properties for applications in electronics, optics, sensors, and mechanical actuators. In order to realize this potential, engineers need to be able to put tiny crystals exactly where they are needed and to control the orientation of the crystal’s lattice. Researchers at the Wisconsin MRSEC and Argonne National Lab have studied a new way to place tiny oxide crystals through controlled, seeded crystallization of disordered, amorphous thin films. They have demonstrated controlled crystal growth at desired locations either from seeds of the same material (homoepitaxy) or seeds of a different material (heteroepitaxy). This work is an important step toward general control of oxide crystals and new applications.

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