Electronic transitions and dielectric functions of relaxor ferroelectric Pb(In1∕2Nb1∕2)O3-Pb(Mg1∕3Nb2∕3)O3-PbTiO3 single crystals: Temperature dependent spectroscopic study

2014 ◽  
Vol 104 (13) ◽  
pp. 132903 ◽  
Keyword(s):  
Spectroscopic Study ◽  
Single Crystals ◽  
Relaxor Ferroelectric ◽  
Electronic Transitions ◽  
Temperature Dependent

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

Raman spectroscopic study of structural transition in SrxBa1−xNb2O6 single crystals

2012 ◽  
Vol 62 ◽  
pp. 273-278 ◽  
Author(s):  
K. Samanta ◽  
A.K. Arora ◽  
T.R. Ravindran ◽  
S. Ganesamoorthy ◽  
K. Kitamura ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Single Crystals ◽  
Structural Transition ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study

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.

Photoelectron spectroscopic study of electronic state and surface structure of In2O3 single crystals

2016 ◽  
Vol 10 (1) ◽  
pp. 011102 ◽  
Author(s):  
Takahiro Nagata ◽  
Oliver Bierwagen ◽  
Zbigniew Galazka ◽  
Masataka Imura ◽  
Shigenori Ueda ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Surface Structure ◽  
Single Crystals ◽  
Electronic State

Magnetic properties of undoped and Co-doped n-type β–FeSi2.5 single crystals

2002 ◽  
Vol 17 (11) ◽  
pp. 2960-2965 ◽  
Author(s):  
E. Arushanov ◽  
L. Ivanenko ◽  
D. Eckert ◽  
G. Behr ◽  
U. K. Rößler ◽  
...  
Keyword(s):  
Activation Energy ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
External Field ◽  
Single Crystals ◽  
Spin Glasses ◽  
Paramagnetic Centers ◽  
Temperature Dependent ◽  
Paramagnetic Curie Temperature ◽  
Co Doped

Results of magnetization and magnetic susceptibility measurements on undoped and Co-doped FeSi2.5 single crystals are presented. The temperature dependence of the magnetic susceptibility of the Co-doped sample in the range of 5–300 K can be explained by temperature-dependent contributions due to paramagnetic centers and the carriers excited thermally in the extrinsic conductivity region. The values of the paramagnetic Curie temperature and activation energy of the donor levels were estimated. It is also shown that the magnetic susceptibility of Co-doped samples cooled in zero external field and in a field are different. This resembles the properties of spin-glasses and indicates the presence of coupling between magnetic centers.

The mechanism of work-hardening and slip-band formation

1957 ◽  
Vol 242 (1229) ◽  
pp. 147-159 ◽  
Keyword(s):  
Single Crystals ◽  
Slip Band ◽  
Work Hardening ◽  
Stage I ◽  
Polycrystalline Materials ◽  
Temperature Dependent ◽  
Band Formation ◽  
Slip Bands ◽  
Three Stages ◽  
The Difference

A summary is given of some present ideas on the mechanism of work-hardening of single crystals and polycrystalline materials. In particular, the difference is stressed between the three stages of hardening: stage I, or easy glide; stage II, the region of rapid hardening accompanied by short slip lines; and stage III, the region of slow or parabolic hardening which is temperature-dependent and in which long slip bands are formed.

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
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