Surface layer in relaxor ferroelectric PZN-4.5%PT single crystals

2007 ◽  
Vol 101 (12) ◽  
pp. 124104 ◽  
Author(s):  
W. S. Chang ◽  
M. Shanthi ◽  
K. K. Rajan ◽  
L. C. Lim ◽  
F. T. Wang ◽  
...  
Keyword(s):  
Surface Layer ◽  
Single Crystals ◽  
Relaxor Ferroelectric

Low-Frequency Central Peaks In Relaxor Ferroelectric PZN-9%PT Single Crystals

2007 ◽  
Vol 347 (1) ◽  
pp. 25-29 ◽  
Author(s):  
Jae-Hyeon Ko ◽  
Do Han Kim ◽  
Seiji Kojima
Keyword(s):  
Single Crystals ◽  
Low Frequency ◽  
Relaxor Ferroelectric

Magnetic ordering in relaxor ferroelectric (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3 single crystals

2007 ◽  
Vol 22 (8) ◽  
pp. 2116-2124 ◽  
Author(s):  
Li Feng ◽  
Haiyan Guo ◽  
Zuo-Guang Ye
Keyword(s):  
Single Crystals ◽  
Magnetic Measurements ◽  
Ferroelectric Properties ◽  
Magnetic Ordering ◽  
Magnetic Behavior ◽  
Relaxor Ferroelectric ◽  
X Ray Diffraction ◽  
Ferroelectric State ◽  
Temperature Changes ◽  
Temperature Solution

Single crystals of the perovskite solid solution (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3, with x = 0, 0.07, 0.27, and 0.75, have been synthesized by the high-temperature solution growth using PbO as flux and characterized by x-ray diffraction and dielectric and magnetic measurements. The crystal structure at room temperature changes from a pseudocubic to a tetragonal phase with the PbTiO3 (PT) content increasing to x ⩾ 0.27. As the amount of PT increases, the relaxor ferroelectric behavior of Pb(Fe2/3W1/3)O3 (PFW) is transformed toward a normal ferroelectric state with sharp and nondispersive peaks of dielectric permittivity at TC. Two types of magnetic orderings are observed on the temperature dependence of the magnetization in the crystals with x ⩽ 0.27. This behavior is explained based on the relationships among the magnetic ordering, perovskite structure, composition, and relaxor ferroelectric properties. Furthermore, the macroscopic magnetization of the system was measured under the application of a magnetic field, which demonstrates different magnetic behavior associated with the weakly ferromagnetic, antiferromagnetic, and paramagnetic ordering in the temperature range of 2 to 390 K. Interestingly, the low-temperature ferromagnetism is enhanced by the addition of ferroelectric PT up to x = 0.27.

Residual stress and interface effect on dielectric mechanisms in poled ultrathin relaxor ferroelectric single crystals

2014 ◽  
Vol 115 (20) ◽  
pp. 204104 ◽  
Author(s):  
Long Li ◽  
Xiangyong Zhao ◽  
Xiaobing Li ◽  
Qing Xu ◽  
Linrong Yang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Single Crystals ◽  
Relaxor Ferroelectric ◽  
Interface Effect

IN-PLANE AND OUT OF PLANE RESISTIVITIES IN BSCCO (2212) SINGLE CRYSTALS AT DIFFERENT DOPING LEVEL

2003 ◽  
Vol 17 (04n06) ◽  
pp. 867-872 ◽  
Author(s):  
R. FASTAMPA ◽  
M. GIURA ◽  
S. SARTI ◽  
R. MARCON ◽  
E. SILVA
Keyword(s):  
Surface Layer ◽  
Single Crystals ◽  
Doping Level ◽  
Current Voltage ◽  
Out Of Plane

Using an eight terminal geometry in standard current/voltage contact configurations we have determined both the out-of-plane and the in-plane d.c. resistivity in BSCCO(2212) samples at different doping level. Comparison of the temperature behaviors for these transport quantities highlights that use of these configurations results in incorrect determinations for the in-plane components. Exploiting the possibility of crossed comparisons when using a multi-terminal technique we are able to ascribe this effect at presence on the sample of surface layer with oxygen contents different from the bulk.

scholarly journals Inhomogeneity and Segregation Effect in the Surface Layer of Fe-Doped SrTiO3 Single Crystals

Crystals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 33 ◽  
Author(s):  
Marcin Wojtyniak ◽  
Katarzyna Balin ◽  
Jacek Szade ◽  
Krzysztof Szot
Keyword(s):  
Electronic Structure ◽  
Surface Layer ◽  
Single Crystals ◽  
Resistive Switching ◽  
Special Focus ◽  
Fe Doping ◽  
Reducing Conditions ◽  
Switching Phenomenon ◽  
Segregation Effect ◽  
Crystal And Electronic Structure

The effect of Fe doping on SrTiO3 single crystals was investigated in terms of crystal and electronic structure over a wide temperature range in both oxidizing and reducing conditions. The electrical properties were thoroughly studied with a special focus on the resistive switching phenomenon. Contrary to the undoped SrTiO3 crystals, where isolated filaments are responsible for resistive switching, the iron-doped crystals showed stripe-like conducting regions at the nanoscale. The results showed a non-uniform Fe distribution of as-received crystals and the formation of new phases in the surface layer of reduced/oxidized samples. The oxidation procedure led to a separation of Ti(Fe) and Sr, while the reduction resulted in the tendency of Fe to agglomerate and migrate away from the surface as seen from the time of flight mass spectroscopy measurements. Moreover, a clear presence of Fe-rich nano-filament in the reduced sample was found.

Optical and Structural Properties of MeV Erbium Implanted LiNbO3

1993 ◽  
Vol 316 ◽  
Author(s):  
M. Fleuster ◽  
CH. Buchal ◽  
E. Snoeks ◽  
A. Polman
Keyword(s):  
Surface Layer ◽  
Single Crystals ◽  
Structural Properties ◽  
Maximum Concentration ◽  
Solid Phase ◽  
Optically Active ◽  
Layer By Layer ◽  
Warm Up

ABSTRACTLiNbO3 single crystals were implanted with Er ions at 3.5 MeV with fluences up to 3*1016 Er/cm2 and subsequently annealed at 1060°C. The warm-up rate of the sample determines whether the implanted, amorphized surface layer recrystallizes via columnar or via layer-by-layer solid phase epitaxial (SPE) growth. The maximum concentration of optically active Er ions is determined to be 0.18 at.%.

Growth and characterization of relaxor ferroelectric PMNT single crystals

1999 ◽  
Vol 231 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Haosu Luo ◽  
Guisheng Xu ◽  
Pingchu Wang ◽  
Zhiwen Yin
Keyword(s):  
Single Crystals ◽  
Relaxor Ferroelectric
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