In-situ observation of domain wall motion in Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 crystals

2014 ◽  
Vol 116 (3) ◽  
pp. 034105 ◽  
Author(s):  
Dabin Lin ◽  
Zhenrong Li ◽  
Fei Li ◽  
Shujun Zhang ◽  
Changlong Cai ◽  
...  
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
In Situ Observation

In-situ Observation of Domain Wall Motion in Electroplated Ni80-Fe20 Thin Film by Lorentz TEM and DPC Imaging

2017 ◽  
Vol 22 (4) ◽  
pp. 563-569 ◽  
Author(s):  
Su Jin Lee ◽  
Hyo-Jong Lee ◽  
Kyung Song ◽  
Si-Young Choi ◽  
Hyun Soon Park
Keyword(s):  
Thin Film ◽  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
In Situ Observation

Observations of Magnetic Domain Structure Change in Nd2Fe14B Magnets at Elevated Temperature with External Magnetic Field by Lorentz Microscopy

2015 ◽  
Vol 1754 ◽  
pp. 31-36 ◽  
Author(s):  
Toshimasa Suzuki ◽  
Koichi Kawahara ◽  
Haruka Tanaka ◽  
Kimihiro Ozaki
Keyword(s):  
Elevated Temperature ◽  
Domain Wall ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Magnetic Domain Wall ◽  
Lorentz Microscopy ◽  
Pinning Effect ◽  
In Situ Observations

ABSTRACTIn this study, we conducted the in-situ observations of the magnetic domain structure change in Nd2Fe14B magnets at elevated temperature by transmission electron microscopy (TEM) / Lorentz microscopy. The in-situ observations in Nd2Fe14B magnets revealed that the magnetization reversal easily occurred at the elevated temperature. At more than 180°C, the magnetic domain wall motion could be observed by applying the magnetic field of less than 20 mT. The motion of the magnetic domain wall was discontinuous and the domain wall jumped to one grain boundary to the neighboring grain boundary at 180°C. On the other hand, the continuous domain wall motion within grain interior as well as discontinuous domain wall motion was observed at 225°C, and some grain boundaries showed still strong pinning effect even at 225°C. The temperature dependence of the pinning effect of grain boundaries would not uniform.

scholarly journals The contribution of 180° domain wall motion to dielectric properties quantified from in situ X-ray diffraction

2017 ◽  
Vol 126 ◽  
pp. 36-43 ◽  
Author(s):  
C.M. Fancher ◽  
S. Brewer ◽  
C.C. Chung ◽  
S. Röhrig ◽  
T. Rojac ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Domain Wall ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals In situ measurement of increased ferroelectric/ferroelastic domain wall motion in declamped tetragonal lead zirconate titanate thin films

2015 ◽  
Vol 117 (5) ◽  
pp. 054103 ◽  
Author(s):  
M. Wallace ◽  
R. L. Johnson-Wilke ◽  
G. Esteves ◽  
C. M. Fancher ◽  
R. H. T. Wilke ◽  
...  
Keyword(s):  
Thin Films ◽  
Domain Wall ◽  
Lead Zirconate Titanate ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
Lead Zirconate ◽  
In Situ Measurement ◽  
Zirconate Titanate

scholarly journals Effect of Electric Field and Temperature on Average Structure and Domain Wall Motion in 0.93Bi0.5Na0.5TiO3-0.07BaTiO3Ceramic

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Jian Wang ◽  
Yun Liu ◽  
Andrew Studer ◽  
Lasse Norén ◽  
Ray Withers
Keyword(s):  
Phase Transition ◽  
Domain Wall ◽  
Electric Field ◽  
Wall Motion ◽  
Domain Wall Motion ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Temperature Phase Transition ◽  
Diffraction Patterns

In situneutron powder diffraction patterns and dielectric spectra of 0.93Bi0.5Na0.5TiO3-0.07BaTiO3ceramic were investigated under different electrical fields and temperatures. An electric-field-induced phase transition from metrically cubic to metrically tetragonal, associated with strong domain wall motion, occurs. Such induced phase and domain wall motion are unchanged until the high-temperature phase transition occurs from metrically tetragonal to metrically cubic. All these changes are irrelevant to the observed depolarization temperature (75°C). The depolarization behaviour is thus suggested to be associated with the local structure caused by the octahedral tilt twinning disorder.

Direct Observation of Reverse Magnetic Domain and Magnetic Domain Wall Motion in Nd-Fe-B Magnet at High Temperature by Lorentz Microscop

MRS Advances ◽  
2016 ◽  
Vol 1 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Toshimasa Suzuki ◽  
Koichi Kawahara ◽  
Masaya Suzuki ◽  
Kenta Takagi ◽  
Kimihiro Ozaki
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Domain Wall ◽  
Wall Motion ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Thin Foil ◽  
Magnetic Domain Wall

ABSTRACTWe conducted the in-situ observations of the magnetic domain structure change in Nd-Fe-B magnets at high temperature by transmission electron microscopy (TEM) / Lorentz microscopy with applying an external magnetic field. Prior to observation, a thin foil was magnetized by an external magnetic field of 2.0 T to almost saturation, then the magnetic domain structures were observed by the Fresnel mode with in-situ heating. At 225°C, reverse magnetic domains were found to generate in the thin foil sample without applying an external magnetic field. When we applied a magnetic field on the same direction to the pre-magnetization direction at 225°C, one magnetic domain wall was pinned by a grain boundary and the other magnetic domain wall moved. As the results, the reverse magnetic domain shrank then annihilated. When we cut the applied magnetic field, the reverse magnetic domain generated at almost the same location. On the other hand, when we applied a magnetic field to the foils in the opposite direction, the reverse domain started to grow, i.e., magnetic domain walls started to move. The observation results of the shrink or growth of the reverse domain showed that the pinning effect of grain boundary against domain wall motion would be different depending on the applied magnetic field direction. Moreover, domain walls was observed to be pinned by grain boundaries at elevated temperature, so that the coercivity of Nd-Fe-B magnet would occur by pinning mechanism.

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