R
Raegan L. Johnson-Wilke
Researcher at Pennsylvania State University
Publications - 30
Citations - 391
Raegan L. Johnson-Wilke is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Ferroelectricity & Lead zirconate titanate. The author has an hindex of 11, co-authored 30 publications receiving 332 citations. Previous affiliations of Raegan L. Johnson-Wilke include Sandia National Laboratories.
Papers
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Journal ArticleDOI
Sputter deposition of PZT piezoelectric films on thin glass substrates for adjustable x-ray optics
Rudeger H. T. Wilke,Raegan L. Johnson-Wilke,Vincenzo Cotroneo,William N. Davis,Paul B. Reid,Daniel A. Schwartz,Susan Trolier-McKinstry +6 more
TL;DR: Good agreement between the results suggests that actuation of PZT thin films can control mirror figure errors to a precision of about 5 nm, allowing sub-arcsecond imaging.
Journal ArticleDOI
In situ measurement of increased ferroelectric/ferroelastic domain wall motion in declamped tetragonal lead zirconate titanate thin films
Margeaux Wallace,Raegan L. Johnson-Wilke,Giovanni Esteves,Chris M. Fancher,Rudeger H. T. Wilke,Jacob L. Jones,Susan Trolier-McKinstry +6 more
TL;DR: In this article, the authors measured the ferroelectric/ferroelastic domain reorientation in a 1.9 μm thick tetragonal {001} oriented PbZr0.3Ti0.7O3 thin film doped with 1% Mn under different mechanical boundary constraints.
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Voltage-Controlled Bistable Thermal Conductivity in Suspended Ferroelectric Thin-Film Membranes.
Brian M. Foley,Margeaux Wallace,John T. Gaskins,Elizabeth A. Paisley,Raegan L. Johnson-Wilke,Jong-Woo Kim,Philip Ryan,Susan Trolier-McKinstry,Patrick E. Hopkins,Jon F. Ihlefeld +9 more
TL;DR: This work opens a path toward a new means to control phonons and phonon-mediated energy in a digital manner at room temperature using only an electric field.
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Quantification of octahedral rotations in strained LaAlO 3 films via synchrotron x-ray diffraction
Raegan L. Johnson-Wilke,Daniel M. Marincel,Shaobo Zhu,Maitri Warusawithana,Alison Hatt,J. Sayre,Kris T. Delaney,Roman Engel-Herbert,Christian M. Schlepütz,Jong-Woo Kim,Venkatraman Gopalan,Nicola A. Spaldin,D. G. Schlom,Philip Ryan,Susan Trolier-McKinstry +14 more
TL;DR: In this paper, the rotational angles of perovskite thin films were derived from the intensity of superlattice reflections measured using synchrotron x-ray diffraction.
Journal ArticleDOI
Ferroelectric/Ferroelastic domain wall motion in dense and porous tetragonal lead zirconate titanate films
Raegan L. Johnson-Wilke,Rudeger H. T. Wilke,Margeaux Wallace,Adarsh Rajashekhar,Giovanni Esteves,Zachary Merritt,Jacob L. Jones,Susan Trolier-McKinstry +7 more
TL;DR: Measurements during weak-field (subcoercive) amplitudes showed 0.6% volume fraction of domains reoriented for the porous films, which demonstrates that extrinsic effects contribute to the dielectric and piezoelectric properties.