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Title: Pyroelectric Response in HfZrO2 Thin FIlms.


Abstract not provided.

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Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
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Resource Relation:
Conference: Proposed for presentation at the 2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Applications of Polar Dielectrics & PFM held August 22-25, 2016 in Darmstadt, Germany.
Country of Publication:
United States

Citation Formats

Smith, Sean, Ihlefeld, Jon, Kitahara, Andrew, Henry, Michael David, Brumbach, Michael T., and Rodriguez, Mark A. Pyroelectric Response in HfZrO2 Thin FIlms.. United States: N. p., 2016. Web.
Smith, Sean, Ihlefeld, Jon, Kitahara, Andrew, Henry, Michael David, Brumbach, Michael T., & Rodriguez, Mark A. Pyroelectric Response in HfZrO2 Thin FIlms.. United States.
Smith, Sean, Ihlefeld, Jon, Kitahara, Andrew, Henry, Michael David, Brumbach, Michael T., and Rodriguez, Mark A. 2016. "Pyroelectric Response in HfZrO2 Thin FIlms.". United States. doi:.
title = {Pyroelectric Response in HfZrO2 Thin FIlms.},
author = {Smith, Sean and Ihlefeld, Jon and Kitahara, Andrew and Henry, Michael David and Brumbach, Michael T. and Rodriguez, Mark A.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 8

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  • Abstract not provided.
  • Ferroelectric lead zirconate titanate [Pb(Zr{sub x}Ti{sub 1-x}O){sub 3}, (PZT x:1-x)] has received considerable interest for applications related to uncooled infrared devices due to its large pyroelectric figures of merit near room temperature, and the fact that such devices are inherently ac coupled, allowing for simplified image post processing. For ferroelectric films made by industry-standard deposition techniques, stresses develop in the PZT layer upon cooling from the processing/growth temperature due to thermal mismatch between the film and the substrate. In this study, we use a non-linear thermodynamic model to investigate the pyroelectric properties of polycrystalline PZT thin films for five differentmore » compositions (PZT 40:60, PZT 30:70, PZT 20:80, PZT 10:90, PZT 0:100) on silicon as a function of processing temperature (25–800 °C). It is shown that the in-plane thermal stresses in PZT thin films alter the out-of-plane polarization and the ferroelectric phase transformation temperature, with profound effect on the pyroelectric properties. PZT 30:70 is found to have the largest pyroelectric coefficient (0.042 μC cm{sup −2} °C{sup −1}, comparable to bulk values) at a growth temperature of 550 °C; typical to what is currently used for many deposition processes. Our results indicate that it is possible to optimize the pyroelectric response of PZT thin films by adjusting the Ti composition and the processing temperature, thereby, enabling the tailoring of material properties for optimization relative to a specific deposition process.« less
  • Pyroelectric coefficients were measured for 20 nm thick crystalline hafnium zirconium oxide (Hf 1-xZr xO 2) thin films across a composition range of 0 ≤ x ≤ 1. Pyroelectric currents were collected near room temperature under zero applied bias and a sinusoidal oscillating temperature profile to separate the influence of non-pyroelectric currents. The pyroelectric coefficient was observed to correlate with zirconium content, increased orthorhombic/tetragonal phase content, and maximum polarization response. The largest measured absolute value was 48 μCm -2K -1 for a composition with x = 0.64, while no pyroelectric response was measured for compositions which displayed no remanent polarizationmore » (x = 0, 0.91, 1).« less
  • The synthesis of a new class of piezo- and pyroelectrically active materials of various co- and terpolymers of tributylin methacrylate (TBTM) and trimethyltin methacrylate (TMTM) is described. A description of sample preparation, poling techniques, and measurement system is given in some detail. Films of the various polymer compositions were evaluated for tin current, glass transition temperature (Tg), crystallinity or ordering of the amorphous phase and piezo- and pytoelectric activity. Experimental results on 25 to 30 mol% TBTM/methyl methacrylate copolymers, which possessed good piezoelectric activity, antifouling properties and paint-formulation characteristics, are discussed in detail. Solvent-induced orientation effects that lead to piezoelectricmore » activity in amorphous, unpoled, polymers are also described.« less
  • This paper deals with the thermal limitations placed on the high-frequency response of a superconducting device (switch) composed of a thin film (YBa{sub 2}Cu{sub 3}O{sub 7}) deposited on magnesium, sapphire, or silver substrates. In applying successive current pulses to the film, the heat generated during the quench must be transmitted from the film (source) through the substrate and dissipated in the coolant bath. The heat transfer from the film to the coolant medium is modeled in stages using plane wave theory. The optimum high-frequency response is obtained by matching the acoustic impedance of the multilayered structure to that of themore » liquid coolant (load).« less