Effect of substrate orientation on local magnetoelectric coupling in bi-layered multiferroic thin films

Nanoscale ◽  
2018 ◽  
Vol 10 (44) ◽  
pp. 20618-20627 ◽  
Author(s):  
M. Naveed-Ul-Haq ◽  
Samira Webers ◽  
Harsh Trivedi ◽  
Soma Salamon ◽  
Heiko Wende ◽  
...  
Keyword(s):  
Thin Films ◽  
Boundary Conditions ◽  
Magnetoelectric Coupling ◽  
Substrate Orientation ◽  
Interfacial Boundary

In this study we explore the prospect of strain-mediated magnetoelectric coupling in CoFe2O4–BaTiO3 bi-layers as a function of different interfacial boundary conditions.

Boundary conditions for the formation of a ferromagnetic phase during the deposition of Ti1-x Co x O2-δ thin films

2005 ◽  
Vol 50 (4) ◽  
pp. 686-689 ◽  
Author(s):  
L. A. Balagurov ◽  
E. A. Gan’shina ◽  
S. O. Klimonskii ◽  
S. P. Kobeleva ◽  
A. F. Orlov ◽  
...  
Keyword(s):  
Thin Films ◽  
Boundary Conditions ◽  
Ferromagnetic Phase

High-Temperature PbTe Thin Films for Use in Cascade Thermoelectric Power Generation

2003 ◽  
Vol 793 ◽  
Author(s):  
J.B. Posthill ◽  
J.C. Caylor ◽  
P.D. Crocco ◽  
T.S. Colpitts ◽  
R. Venkatasubramanian
Keyword(s):  
Thin Films ◽  
Thermal Conductivity ◽  
Power Generation ◽  
High Temperature ◽  
Ambient Temperature ◽  
Thermoelectric Power ◽  
Thermal Evaporation ◽  
Potential Candidate ◽  
Substrate Orientation ◽  
Subtle Effect

ABSTRACTPbTe-based thin films were deposited by thermal evaporation at temperatures ranging from ambient temperature to 430°C on different vicinal GaAs (100) substrates and BaF2 (111). This materials system is being evaluated as a potential candidate thermoelectric material for a mid-temperature stage in a cascade power generation module. Pure PbTe, PbSe, and multilayer PbTe/PbSe films were investigated. All films deposited on different vicinal GaAs (100) substrates were found to be polycrystalline when deposited at 250°C or lower. A subtle effect of substrate orientation and multilayer periodicity appears to contribute to the more randomly oriented polycrystallinity, which also lowers the thermal conductivity. These results are compared with PbTe epitaxial results on BaF2 (111).

Effect of substrate orientation on formation of cluster glass state in epitaxial LaMnO3 thin films

2020 ◽  
Vol 847 ◽  
pp. 156227
Author(s):  
Yong Mei Liang ◽  
Zhan Jie Wang ◽  
Ying Jie Wu ◽  
Jun Liang Lin ◽  
Zhi Dong Zhang
Keyword(s):  
Thin Films ◽  
Substrate Orientation ◽  
Glass State

Measurements of Piezoelectric Constant D33 of Lead Zirconate Titanate (PZT) Through Use of a Mini Impact Hammer

2009 ◽  
Author(s):  
Qing Guo ◽  
G. Z. Cao ◽  
I. Y. Shen
Keyword(s):  
Thin Films ◽  
Boundary Conditions ◽  
Lead Zirconate Titanate ◽  
Low Cost ◽  
Lead Zirconate ◽  
Piezoelectric Constant ◽  
Impulsive Force ◽  
Sensors And Actuators ◽  
Aspect Ratios ◽  
Zirconate Titanate

Lead Zirconate Titanate Oxide (PbZrxTi1−xO3 or PZT) is a piezoelectric material widely used as sensors and actuators. For microactuators, PZT often appears in the form of thin films to maintain proper aspect ratios. This paper is to present a simple and low-cost method to measure piezoelectric constant d33 of PZT thin films, which is a major challenge encountered in the actuator development. We use an impact hammer with a sharp tip to generate an impulsive force that acts on the PZT film. The impulsive force and the responding voltage are then measured to calculate the piezoelectric constant d33. The impulsive force has large enough amplitude so that a good signal-to-noise ratio can be maintained. Furthermore, the impulsive force has extremely short duration, so the discharge effect (i.e., the time constant effect) of the PZT circuit can be ignored. Preliminary testing on bulk PZT through this new method leads to two conclusions. Firstly, boundary conditions of the specimen are critical. In particular, the specimen must be securely fastened. Since the impulsive load only acts on a tiny area, loose boundary conditions can introduce spurious results from other piezoelectric constant d31. Secondly, size of the specimen is critical. Specimen of smaller size leads to more accurate measurements of the piezoelectric constant d33.

Influence of residual stress on magnetoelectric coupling of bilayered CoFe2O4/PMN–PT thin films

2011 ◽  
Vol 21 (29) ◽  
pp. 10738 ◽  
Author(s):  
Ming Feng ◽  
Wen Wang ◽  
Yu Zhou ◽  
Haibo Li ◽  
Dechang Jia
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Magnetoelectric Coupling

Ferroelectricity, ferromagnetism, and magnetoelectric coupling in highly textured thin films of the multiferroic Pb(Fe0.5Nb0.5)O3

2012 ◽  
Vol 1454 ◽  
pp. 51-56 ◽  
Author(s):  
Oscar Raymond-Herrera ◽  
Paola Góngora-Lugo ◽  
Carlos Ostos ◽  
Mario Curiel-Alvarez ◽  
Dario Bueno-Baques ◽  
...  
Keyword(s):  
Thin Films ◽  
Hysteresis Loops ◽  
Rf Magnetron Sputtering ◽  
Magnetoelectric Coupling ◽  
Ferroelectric Materials ◽  
Zero Field ◽  
Different Temperatures ◽  
Ferroelectric Hysteresis ◽  
First Time ◽  
Magnetization Behavior

ABSTRACTA study of the ferroelectric and magnetic properties and of the magnetoelectric coupling effects of Pb(Fe0.5Nb0.5)O3 (PFN) thin films, grown on SrRuO3/Si [(100) or (111)] substrates by the rf-magnetron sputtering technique, is presented. Structural, morphological, and compositional characterization was realized using the XRD, AFM, XPS, and TEM techniques. Highly textured single phase films with different thickness (from 45 to 270 nm) were successfully grown without Fe2+ presence. A vertically [110] oriented grainy structure was observed. Polarization vs. electric field (P-E) hysteresis loops exhibit excellent and almost constant values of the maximum (∼ 60 μC/cm2) and remanent (∼ 22 μC/cm2) polarizations in the temperature range from 4 K to room temperature; small values of the coercive field, characteristic of soft ferroelectric materials, are observed in these samples. Measurements of the zero-field cooled (ZFC) and field cooled (FC) magnetization behavior and magnetic (M-H) hysteresis loops were realized at different temperatures between 5 and 300 K. Proof of the existence of ferromagnetic order in the low temperature region (below to 50 K) is discussed and reported for the first time. Values of the maximum (∼ 3 emu/g) and remanent (∼ 1.5 emu/g) magnetizations were obtained. dc magnetic field dependence of the ferroelectric hysteresis loops are shown as evidence of the magnetoelectric coupling.

New boundary conditions in magnetic thin films

1975 ◽  
Vol 67 (1) ◽  
pp. K51-K55
Author(s):  
L. Kowalewski ◽  
D. Żymierska
Keyword(s):  
Thin Films ◽  
Boundary Conditions ◽  
Magnetic Thin Films
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