Development of a magnetizing stage for in situ observations with electron holography and Lorentz microscopy

2005 ◽  
Vol 54 (6) ◽  
pp. 509-513 ◽  
Author(s):  
M. Inoue
Keyword(s):  
Electron Holography ◽  
Lorentz Microscopy ◽  
In Situ Observations

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 Direct Observation of Nanoscale Magnetization Reversal and Spin Dynamics Using In-Situ Lorentz Microscopy and Electron Holography

2010 ◽  
Vol 16 (S2) ◽  
pp. 576-577
Author(s):  
L Huang ◽  
Y Zhu
Keyword(s):  
Direct Observation ◽  
Magnetization Reversal ◽  
Spin Dynamics ◽  
Electron Holography ◽  
Lorentz Microscopy

Extended abstract of a paper presented at Microscopy and Microanalysis 2010 in Portland, Oregon, USA, August 1 – August 5, 2010.

In-situ Observation of Dipolar Ferromagnetic Phase Transition in Fe3O4 Nanoparticle Arrays by Electron Holography and Lorentz Microscopy

2012 ◽  
Vol 18 (S2) ◽  
pp. 1864-1865
Author(s):  
K. Yamamoto ◽  
T. Hirayama ◽  
C.R. Hogg ◽  
S.A. Majetich ◽  
S. Yamamuro
Keyword(s):  
Phase Transition ◽  
Ferromagnetic Phase ◽  
Electron Holography ◽  
In Situ Observation ◽  
Nanoparticle Arrays ◽  
Fe3o4 Nanoparticle ◽  
Lorentz Microscopy ◽  
Ferromagnetic Phase Transition

Extended abstract of a paper presented at Microscopy and Microanalysis 2012 in Phoenix, Arizona, USA, July 29 – August 2, 2012.

Quantitative in situ magnetization reversal studies in Lorentz microscopy and electron holography

2013 ◽  
Vol 134 ◽  
pp. 144-154 ◽  
Author(s):  
L.A. Rodríguez ◽  
C. Magén ◽  
E. Snoeck ◽  
C. Gatel ◽  
L. Marín ◽  
...  
Keyword(s):  
Magnetization Reversal ◽  
Electron Holography ◽  
Lorentz Microscopy

scholarly journals In Situ Observations of Magnetization Process in Alnico Magnets by Electron Holography and Lorentz Microscopy

2006 ◽  
Vol 47 (3) ◽  
pp. 907-912 ◽  
Author(s):  
Joong Jung Kim ◽  
Hyun Soon Park ◽  
Daisuke Shindo ◽  
Satoshi Hirosawa ◽  
Hideyuki Morimoto
Keyword(s):  
Electron Holography ◽  
Magnetization Process ◽  
Lorentz Microscopy

scholarly journals In Situ Lorentz Microscopy and Electron Holography of Magnetization Process in Ferrite Magnets

2007 ◽  
Vol 48 (10) ◽  
pp. 2621-2625 ◽  
Author(s):  
Toshiharu Aiso ◽  
Daisuke Shindo ◽  
Takafumi Sato
Keyword(s):  
Electron Holography ◽  
Magnetization Process ◽  
Lorentz Microscopy
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