In-situ Observations of Magnetization Reversal Processes of Submicron Square Permalloy Elements Using Lorentz Transmission Electron Microscopy

2001 ◽  
pp. 271-275
Author(s):  
M. Sessner ◽  
M. Schneider ◽  
W. Brunner ◽  
J. Zweck
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetization Reversal ◽  
Transmission Electron ◽  
In Situ Observations ◽  
Lorentz Transmission Electron Microscopy

scholarly journals Imaging of Magnetic Textures in Polycrystalline FeGe Thin Films via in-situ Lorentz Transmission Electron Microscopy

2020 ◽  
Vol 26 (S2) ◽  
pp. 1700-1702
Author(s):  
Nuria Bagues ◽  
Binbin Wang ◽  
Tao Liu ◽  
Camelia Selcu ◽  
Stephen Boona ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Lorentz Transmission Electron Microscopy

Progress in environmental high-voltage transmission electron microscopy for nanomaterials

2020 ◽  
Vol 378 (2186) ◽  
pp. 20190602
Author(s):  
Nobuo Tanaka ◽  
Takeshi Fujita ◽  
Yoshimasa Takahashi ◽  
Jun Yamasaki ◽  
Kazuyoshi Murata ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Voltage ◽  
High Energy ◽  
Transmission Electron ◽  
Recent Developments ◽  
In Situ Observations ◽  
High Voltage Transmission ◽  
And Function

A new environmental high-voltage transmission electron microscope (E-HVEM) was developed by Nagoya University in collaboration with JEOL Ltd. An open-type environmental cell was employed to enable in-situ observations of chemical reactions on catalyst particles as well as mechanical deformation in gaseous conditions. One of the reasons for success was the application of high-voltage transmission electron microscopy to environmental (in-situ) observations in the gas atmosphere because of high transmission of electrons through gas layers and thick samples. Knock-on damages to samples by high-energy electrons were carefully considered. In this paper, we describe the detailed design of the E-HVEM, recent developments and various applications. This article is part of a discussion meeting issue ‘Dynamic in situ microscopy relating structure and function'.

In-situ TEM studies of magnetization reversal processes in magnetic nanostructures

2005 ◽  
Vol 907 ◽  
Author(s):  
Amanda K Petford-Long ◽  
Thomas Bromwich ◽  
Amit Kohn ◽  
Victoria Jackson ◽  
Takeshi Kasama ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Magnetization Reversal ◽  
Giant Magnetoresistance ◽  
Magnetic Nanostructures ◽  
Magnetic Domain ◽  
Ferromagnetic Material ◽  
In Situ Tem ◽  
Transmission Electron

AbstractOne of the most widely studied types of magnetic nanostructure is that used in devices based on the giant magnetoresistance (GMR) or tunnel magnetoresistance (TMR) phenomena. In order to understand the behaviour of these materials it is important to be able to follow their magnetisation reversal mechanism, and one of the techniques enabling micromagnetic studies at the sub-micron scale is transmission electron microscopy. Two techniques can be used: Lorentz transmission electron microscopy and off-axis electron holography, both of which allow the magnetic domain structure of a ferromagnetic material to be investigated dynamically in real-time with a resolution of a few nanometres. These techniques have been used in combination with in situ magnetizing experiments, to carry out qualitative and quantitative studies of magnetization reversal in a range of materials including spin-tunnel junctions, patterned thin film elements and magnetic antidot arrays. Quantitative analysis of the Lorentz TEM data has been carried out using the transport of intensity equation (TIE) approach.

Role of the Interfaces on the Activation of Slip Systems in The PST TiAl Alloy

1998 ◽  
Vol 552 ◽  
Author(s):  
Slim Zghal ◽  
Haruyuki Inui ◽  
Masaharu Yamaguchi ◽  
Alain Couret
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Tial Alloy ◽  
Slip Systems ◽  
Post Mortem ◽  
Transmission Electron ◽  
In Situ Observations ◽  
Deformation Modes

ABSTRACTThe operative slip systems in the so-called PST alloy are determined by transmission electron microscopy. Both post-mortem analyses and in situ observations are presented. It is shown that glide of ordinary dislocations and twinning are the most easily deformation modes activated at yield. The role of the interfaces on the activation of these operative slip systems is then examined and discussed.

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