IEEE-UFFC Distinguished Lecture: Thermodynamics and Phase-field Method of Ferroelectric Crystals with Domains
IEEE-UFFC Distinguished Lecture: Thermodynamics and Phase-field Method of Ferroelectric Crystals with Domains
Long-Qing Chen
The Pennsylvania State University
The lecture discusses the thermodynamics and the phase-field method of ferroelectric crystals and their applications to modeling and predicting the stability of domain structures and their responses to mechanical and electric fields. It will start with the basic principles of classical thermodynamics by introducing a modern version of the first law of thermodynamics and applying it to obtain the fundamental equation of thermodynamics for homogeneous ferroelectric crystals. The relations of the fundamental equations of thermodynamics, Landau and fluctuation theories of ferroelectrics, and the thermodynamic properties will then be discussed. It will then be followed by the discussion on the thermodynamics of ferroelectric crystals containing domain structures involving long-range elastic and electrostatic interactions and domain wall energy. The last part of the lecture will be focused on the applications of the phase-field method of ferroelectric domain structures. Examples will be presented to illustrate the application of the phase-field method to interpreting and understanding experimentally observed ferroelectric domain structures and to providing guidance to experimental growth of thin films and characterization to discover new mesoscale domain states of materials, achieve dramatically enhanced properties, and uncover hidden functionality.
Long-Qing Chen is Hamer Professor of Materials Science and Engineering at Penn State. He received his Ph.D. from MIT, M.S. from Stony Brook University, and B.S. from Zhejiang University. His main research interests include thermodynamic theory and computational model development for understanding solid phase transitions and microstructure development. His research awards include the Materials Research Society (MRS) Materials Theory Award, The Minerals, Metals & Materials Society (TMS) John Bardeen Award, American Ceramic Society (ACerS) Ross Coffin Purdy Award, TMS Cyril Stanley Smith Award, TMS William Hume-Rothery Award, The American Society of Metals (ASM) International Silver Medal, and IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society (IEEE-UFFC-S) Distinguished Lecture Award. He is a Guggenheim Fellow, a Humboldt Research Awardee, a Foreign Member of Academy of Europe (Academia of Europaea, MAE), and a member of the US National Academy of Engineering (NAE).
Date and Time
Location
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Registration
- Date: 18 Jun 2025
- Time: 08:00 AM UTC to 10:00 AM UTC
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- Institut des Nanotechnologies de Lyon
- 1 rue Enrico Fermi
- Villeurbanne, Rhooe-Alpes
- France 69100
- Building: Batiment Irene Joliot-Curie
- Room Number: Salle des thèses
- Contact Event Host
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Dr. Bertrand VILQUIN
Maitre de conférences HDR / Ass. Prof. Centrale Lyon
Vice chair (Ferroelectrics) France UFFC ChapterMail: bertrand.vilquin@ec-lyon.fr
- Co-sponsored by Institut des Nanotechnologies de Lyon
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- Starts 21 May 2025 05:27 PM UTC
- Ends 18 June 2025 07:31 AM UTC
- No Admission Charge
Speakers
Long-Qing Chen of The Pennsylvania State University
Thermodynamics and Phase-field Method of Ferroelectric Crystals with Domains
The lecture discusses the thermodynamics and the phase-field method of ferroelectric crystals and their applications to modeling and predicting the stability of domain structures and their responses to mechanical and electric fields. It will start with the basic principles of classical thermodynamics by introducing a modern version of the first law of thermodynamics and applying it to obtain the fundamental equation of thermodynamics for homogeneous ferroelectric crystals. The relations of the fundamental equations of thermodynamics, Landau and fluctuation theories of ferroelectrics, and the thermodynamic properties will then be discussed. It will then be followed by the discussion on the thermodynamics of ferroelectric crystals containing domain structures involving long-range elastic and electrostatic interactions and domain wall energy. The last part of the lecture will be focused on the applications of the phase-field method of ferroelectric domain structures. Examples will be presented to illustrate the application of the phase-field method to interpreting and understanding experimentally observed ferroelectric domain structures and to providing guidance to experimental growth of thin films and characterization to discover new mesoscale domain states of materials, achieve dramatically enhanced properties, and uncover hidden functionality.
Biography:
Long-Qing Chen is Hamer Professor of Materials Science and Engineering at Penn State. He received his Ph.D. from MIT, M.S. from Stony Brook University, and B.S. from Zhejiang University. His main research interests include thermodynamic theory and computational model development for understanding solid phase transitions and microstructure development. His research awards include the Materials Research Society (MRS) Materials Theory Award, The Minerals, Metals & Materials Society (TMS) John Bardeen Award, American Ceramic Society (ACerS) Ross Coffin Purdy Award, TMS Cyril Stanley Smith Award, TMS William Hume-Rothery Award, The American Society of Metals (ASM) International Silver Medal, and IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society (IEEE-UFFC-S) Distinguished Lecture Award. He is a Guggenheim Fellow, a Humboldt Research Awardee, a Foreign Member of Academy of Europe (Academia of Europaea, MAE), and a member of the US National Academy of Engineering (NAE).
Address:N-229 Millennium Science Complex, Penn State College of Earth and Mineral Sciences, University Park, Pennsylvania, United States, 16802