scholarly journals Humidity Effects on Domain Structure and Polarization Switching of Pb(Zn1/3Nb2/3)O3-x%PbTiO3 (PZN-x%PT) Single Crystals

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2447
Author(s):  
Hongli Wang ◽  
Kaiyang Zeng
Keyword(s):  
Relative Humidity ◽  
Single Crystals ◽  
Domain Structure ◽  
Hysteresis Loops ◽  
Water Layer ◽  
Piezoresponse Force Microscopy ◽  
Polarization Switching ◽  
Sample Surface ◽  
Humid Atmosphere ◽  
Ferroelectric Hysteresis

The effect of relative humidity on the domain structure imaging and polarization switching process of Pb(Zn1/3Nb2/3)O3-x%PbTiO3 (PZN-x%PT) ferroelectric single crystals has been investigated by means of the piezoresponse force microscopy (PFM) and piezoresponse force spectroscopy (PFS) techniques. It was found that the PFM amplitude increases with the relative humidity, and that the ferroelectric hysteresis loops at different relative humidity levels show that the coercive bias decreases with the increase in relative humidity. These observed phenomena are attributed to the existence of the water layer between the probe tip and the sample surface in a humid atmosphere, which could affect the effect of the electric field distribution and screening properties at the ferroelectric sample surface. These results provide a better understanding of the water adsorption phenomena at the nanoscale in regard to the fundamental understanding of ferroelectrics’ properties.

Study of LiNbO3 single crystals with a regular domain structure by piezoresponse force microscopy

2012 ◽  
Vol 57 (6) ◽  
pp. 781-784 ◽  
Author(s):  
D. A. Kiselev ◽  
A. S. Bykov ◽  
R. N. Zhukov ◽  
V. V. Antipov ◽  
M. D. Malinkovich ◽  
...  
Keyword(s):  
Single Crystals ◽  
Domain Structure ◽  
Piezoresponse Force Microscopy ◽  
Regular Domain ◽  
Force Microscopy ◽  
Regular Domain Structure

scholarly journals Temperature-Induced Phase Transition Characteristics of [001]-Oriented 0.93Pb(Zn1/3Nb2/3)O3-0.07PbTiO3 (PZN-7%PT) Single Crystal by Using Piezoresponse Force Microscopy

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 855
Author(s):  
Hongli Wang ◽  
Kaiyang Zeng
Keyword(s):  
Phase Transition ◽  
Single Crystals ◽  
Domain Structure ◽  
Transition Process ◽  
Piezoresponse Force Microscopy ◽  
Local Domain ◽  
Force Microscopy ◽  
Domain Structures ◽  
Phase Transition Process ◽  
Collective Process

The evolution of the domain structures of [001]-oriented relaxor ferroelectric 0.93PbZn1/3Nb2/3O3-0.07PbTiO3 (PZN-7%PT) single crystals as a function of temperature was investigated in situ by using piezoresponse force microscopy (PFM). It was found that the local domain structure of PZN-7%PT single crystals at room temperature is rhombohedral with nanoscale twins. Temperature-dependent domain structures showed that the phase transition process is a collective process and that the sample underwent a sequence of rhombohedral (R) → monoclinic (Mc) → tetragonal (T) → cubic (C) phase transformations when the temperature increased from 25 °C to 170 °C. The results provide direct observation of the phase transition evolution of PZN-7%PT single crystals as a function of temperature, which is of great significance to fully understand the relationships between the domain structure and phase structure of PZN-7%PT single crystals.

PIEZORESPONSE FORCE MICROSCOPY STUDIES ON (100), (110) AND (111) EPITAXIALLY GROWTH BiFeO3 THIN FILMS

2012 ◽  
Vol 1477 ◽  
Author(s):  
R. P. Fernandes ◽  
L. Batista ◽  
A. C. G. Castro ◽  
L. Salamanca-Riba ◽  
M. P. Cruz ◽  
...  
Keyword(s):  
Thin Films ◽  
Domain Structure ◽  
Bismuth Ferrite ◽  
Random Access ◽  
Low Frequency ◽  
Piezoresponse Force Microscopy ◽  
Acoustic Microscopy ◽  
Force Microscopy ◽  
Piezo Force Microscopy ◽  
Ferroelectric Hysteresis

ABSTRACTBismuth ferrite (BiFeO3) is a magnetoelectric, multiferroic material with coexisting ferroelectric and magnetic orderings. It is considered as a candidate for the next generation of ferroelectric random-access memory devices because BiFeO3, in contrast to industrial ferroelectrics used today, does not contain the toxic element lead. Furthermore, its polarization values are higher than those of lead-based ferroelectrics. The magnitude of the polarization of a BiFeO3 film is dependent on its orientation and is related to the domain structure. This contribution presents and discusses the preparation of epitaxial BiFeO3 (BFO) thin films grown on SrRuO3/SrTiO3 substrates by pulsed laser deposition (PLD) and their characterization, especially by piezo force microscopy (PFM) and atomic force acoustic microscopy (AFAM). The thickness of an individual BFO film varies between 100 and 200 nm. The epitaxial nature of films in the crystallographic (100), (110), and (111) directions was confirmed by x-ray diffraction (XRD). Thin SrRuO3 layers, also prepared by PLD, were used as bottom electrode for the ferroelectric hysteresis measurements. Low frequency PFM measurements showed a monodomain structure for the as-grown (110) and (111) oriented samples. In BFO (100) films, different polarization variants were observed by ultrasonic piezo force microscopy (UPFM). The domain structure is reproduced from minimization of the electrostatic and elastic energies. Switching experiments using standard PFM as well as UPFM were carried out on the three samples with the objective of testing the coercive field and domain stability. The AFAM technique was used to map the elastic properties of the BFO thin-films at the micro- and nanoscale.

Ferroelectric domain structure of PbZr0.35Ti0.65O3 single crystals by piezoresponse force microscopy

2011 ◽  
Vol 110 (5) ◽  
pp. 052003 ◽  
Author(s):  
I. K. Bdikin ◽  
J. A. Pérez ◽  
I. Coondoo ◽  
A. M. R. Senos ◽  
P. Q. Mantas ◽  
...  
Keyword(s):  
Single Crystals ◽  
Domain Structure ◽  
Piezoresponse Force Microscopy ◽  
Ferroelectric Domain ◽  
Force Microscopy ◽  
Ferroelectric Domain Structure

scholarly journals Tunable magnetization steps in mixed valent ferromagnet Eu2CoMnO6

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nara Lee ◽  
Jong Hyuk Kim ◽  
Dong Gun Oh ◽  
Hyun Jun Shin ◽  
Hwan Young Choi ◽  
...  
Keyword(s):  
Material Processing ◽  
Magnetic Properties ◽  
Single Crystals ◽  
Magnetic State ◽  
Hysteresis Loops ◽  
Double Perovskite ◽  
Processing Parameters ◽  
Perovskite Oxides ◽  
Efficient Approach ◽  
Isothermal Magnetization

AbstractMagnetic properties can be manipulated to enhance certain functionalities by tuning different material processing parameters. Here, we present the controllable magnetization steps of hysteresis loops in double-perovskite single crystals of Eu2CoMnO6. Ferromagnetic order emerges below TC ≈ 122 K along the crystallographic c axis. The difficulty in altering Co2+ and Mn4+ ions naturally induces additional antiferromagnetic clusters in this system. Annealing the crystals in different gas environments modifies the mixed magnetic state, and results in the retardation (after O2-annealing) and bifurcation (after Ar-annealing) of the magnetization steps of isothermal magnetization. This remarkable variation offers an efficient approach for improving the magnetic properties of double-perovskite oxides.

Investigation of the domain structure and hierarchy in potassium–sodium niobate lead-free piezoelectric single crystals

RSC Advances ◽  
2016 ◽  
Vol 6 (54) ◽  
pp. 49060-49067 ◽  
Author(s):  
Micka Bah ◽  
Natalya Alyabyeva ◽  
Richard Retoux ◽  
Fabien Giovannelli ◽  
Mustapha Zaghrioui ◽  
...  
Keyword(s):  
Single Crystals ◽  
Domain Structure ◽  
Lead Free ◽  
Nanometer Scale ◽  
Sodium Niobate ◽  
Potassium Sodium Niobate ◽  
Length Scales ◽  
Potassium Sodium ◽  
Domain Structures ◽  
Self Organized

We reported self-organized and hierarchized domain structures on various length scales ranging from micrometer to nanometer scale in K0.5Na0.5NbO3 crystals.

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