msepostdoc-list Preliminary Exam Seminar

[Morgan, Yuan-Yu Karen]

Please consider attending this seminar:

MATERIALS ENGINEERING
SEMINAR

"The Impact of Strain on Bismuth-Based Oxides"

By

James Barnard
Purdue MSE Preliminary Exam


Advisor: Professor Haiyan Wang


ABSTRACT


The field of thin film materials with multiferroic properties (simultaneous ferromagnetism and ferroelectricity) has drawn much attention toward nanoelectronic device applications. An appealing new Bismuth oxide system has been discovered in thin film form. This BiFeMnO system, discovered by the study of a nanocomposite of BiFeO3 and BiMnO3, is strongly multiferroic. However, there are multiple phases that grow preferentially under various conditions, including a pseudocubic structure and a layered supercell structure. The growth of the desirable multiferroic layered supercell phase is contingent on a large film strain. The impact of strain on the film has been examined through lattice misfit by substrate and buffer layer selection. Film thickness has also played a role in the film characteristics. In this review, the history of the system and its recent development and tuning will be discussed, as well as the promising future work towards device applications.







Date: Nov 5, Friday, 2021

Time: 8:30 AM
Room: ARMS 1103
Or WebEx: https://purdue.webex.com/purdue/j.php?MTID=mab828a9cc840b6da6ef72a7363b1ca36




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