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March 2021

Speaker: Dr. Ruijuan Xu, Stanford University

March 19 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Speaker:  Dr. Ruijuan Xu, Department of Applied Physics, Stanford University Title:  Controlling ferroelectricity at the nanoscale: from oxide heterostructures to freestanding crystalline membranes Abstract Complex oxides are fascinating material systems exhibiting a diverse set of electrical, magnetic, and thermal properties. In particular, ferroelectric oxides with an electrically switchable polarization and large dielectric and piezoelectric responses are considered as critical components for next-generation low-power logic devices, non-volatile memories, and nanoscale sensors and actuators, etc. Recent advances in thin-film synthesis techniques including the…

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Speaker: Dr. Betul Akkopru Akgun, Penn State University

March 26 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Speaker:  Dr. Betul Akkopru Akgun, The Pennsylvania State University Title:  The Role of Defect Chemistry in DC Resistance Degradation of Lead Zirconate Titanate Thin Films Abstract The trend towards further miniaturization of MEMS devices has dramatically increased the magnitude of the electric field distributed across the PZT film under an applied bias. As a result, the electrical reliability issues, among which the DC resistance degradation is the main limiting factor to PZT films’ lifetime, become of great concern. Therefore, it…

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Speaker: Dr. Alp Sehirlioglu, Case Western Reserve University

March 30 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Speaker:  Dr. Alp Sehirlioglu, Case Western Reserve University Title:  Guiding the search for high-temperature ferroelectric perovskites Abstract: High temperature ferroelectrics are sought after for actuator applications such as deep well oil drilling, fuel modulation in jet engines or ultrasonic drilling on the surface of Venus. The use of converse piezoelectric effect in actuators require large piezoelectric coefficients to obtain the necessary displacement under a reasonable electric field or within a suitable volume. As a result, of interest are perovskite ferroelectrics near…

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April 2021

Speaker: Dr. Alexei Gruverman, University of Nebraska-Lincoln

April 2 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Speaker:  Alexei Gruverman, Department of Physics and Astronomy, University of Nebraska-Lincoln Title:  Nanoelectronic Phenomena in Low-Dimensional Ferroelectrics Abstract: 100 years since the discovery of ferroelectricity, this phenomenon still remains a center of intense research. The electrically switchable polarization, which is strongly coupled to the physical properties of ferroelectrics, determines the multifunctional nature of their responses to the external stimuli and underpins our ability to address a range of technological applications related to future computing. Over the last decade there has been a remarkable…

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Speaker: Dr. Kyle Webber, FAU

April 9 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Speaker:  Dr. Kyle Webber, Department of Materials Science and Engineering FAU, Germany Title: Stress-Modulated Electromechanical Properties of Lead-Free Ferroelectrics Abstract: Ferroelectrics are a critical enabling technology used in numerous applications in, e.g., automotive, aerospace, military, and medical fields, due to an electromechanical coupling. Currently, however, the majority of these applications depend on material systems containing lead, posing serious environmental and health concerns. This has led to a concerted effort over the past ~20 years to develop lead-free alternatives, paralleling previous efforts to…

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Early Career Lecture Series: Dr. Jill Wenderott, Northwestern

April 16 @ 11:00 am - 12:00 pm
EB1 – Room 1011, 911 Partners Way
Raleigh, NC 27695-7907 United States

Spring 2021 Early Career Lecture Series in Materials Science & Engineering Speaker:  Dr. Jill Wenderott Department of Materials Science & Engineering, Northwestern University Subject:  Elucidating Synthesis Pathways to Molybdenum Oxynitrides for Use in Catalysis Applications Abstract: Molybdenum nitrides, typically the cubic γ-Mo2N and hexagonal MoN phases, have been investigated for their utilization in a variety of electronic and catalysis applications. These molybdenum nitrides are often synthesized via ammonolysis of molybdenum oxide powders at elevated temperatures. Commonly, ammonolysis of molybdenum trioxide (MoO3…

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