The analysis of magnetic domain wall structures in the transition region of Néel and Bloch Walls by Lorentz microscopy

1976 ◽  
Vol 36 (1) ◽  
pp. 335-344 ◽  
Author(s):  
P. Schwellinger
Keyword(s):  
Domain Wall ◽  
Transition Region ◽  
Magnetic Domain ◽  
Magnetic Domain Wall ◽  
Lorentz Microscopy ◽  
Wall Structures

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 In-situ Observations of Interaction of Magnetic Domain Wall with Grain Boundaries by Lorentz Microscopy

Materia Japan ◽  
2004 ◽  
Vol 43 (12) ◽  
pp. 1001-1001
Author(s):  
Sadahiro Tsurekawa ◽  
Tadao Watanabe ◽  
Yohei Ando ◽  
Koichi Kawahara
Keyword(s):  
Domain Wall ◽  
Grain Boundaries ◽  
Magnetic Domain ◽  
Magnetic Domain Wall ◽  
Lorentz Microscopy

Magnetic domain wall structures in free-standing Fe(1 1 0) monolayers

2005 ◽  
Vol 244 (1-4) ◽  
pp. 485-488 ◽  
Author(s):  
Yoshifumi Takeda ◽  
Kohji Nakamura ◽  
Toru Akiyama ◽  
Tomonori Ito
Keyword(s):  
Domain Wall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall ◽  
Free Standing ◽  
Wall Structures

scholarly journals Comparison of Magnetic Domain Wall Images using Lorentz Microscopy and Magnetic Force Microscopy

2013 ◽  
Vol 19 (S2) ◽  
pp. 790-791
Author(s):  
S. Hua ◽  
M. De Graef
Keyword(s):  
Domain Wall ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Magnetic Domain ◽  
Magnetic Domain Wall ◽  
Lorentz Microscopy ◽  
Force Microscopy

Extended abstract of a paper presented at Microscopy and Microanalysis 2013 in Indianapolis, Indiana, USA, August 4 – August 8, 2013.

Temperature Dependence of Magnetic Domains and Wall Structures

1972 ◽  
Vol 30 ◽  
pp. 496-497
Author(s):  
Sonoko Tsukahara ◽  
Tadami Taoka ◽  
Hisao Nishizawa
Keyword(s):  
Temperature Dependence ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Iron Film ◽  
Objective Lens ◽  
Lorentz Microscopy ◽  
Domain Structures ◽  
Wall Structures ◽  
Crystal Films ◽  
Metallurgical Structure

The high voltage Lorentz microscopy was successfully used to observe changes with temperature; of domain structures and metallurgical structures in an iron film set on the hot stage combined with a goniometer. The microscope used was the JEM-1000 EM which was operated with the objective lens current cut off to eliminate the magnetic field in the specimen position. Single crystal films with an (001) plane were prepared by the epitaxial growth of evaporated iron on a cleaved (001) plane of a rocksalt substrate. They had a uniform thickness from 1000 to 7000 Å.The figure shows the temperature dependence of magnetic domain structure with its corresponding deflection pattern and metallurgical structure observed in a 4500 Å iron film. In general, with increase of temperature, the straight domain walls decrease in their width (at 400°C), curve in an iregular shape (600°C) and then vanish (790°C). The ripple structures with cross-tie walls are observed below the Curie temperature.

Numerical Analysis of a Magnetic Domain Wall in a Magnetic Nanocontact

2005 ◽  
Vol 29 (2) ◽  
pp. 116-119
Author(s):  
T. Komine ◽  
T. Takahashi ◽  
R. Sugita ◽  
T. Muranoi ◽  
Y. Hasegawa
Keyword(s):  
Numerical Analysis ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall
Sign in / Sign up

Export Citation Format

Share Document