Surface damage of ferritic steels by helium ion irradiation

1986 ◽  
Vol 95 (1) ◽  
pp. 99-103
Author(s):  
B. Panigkahi ◽  
A. K. Tyagi ◽  
R. V. Nandedkar
Keyword(s):  
Ion Irradiation ◽  
Surface Damage ◽  
Ferritic Steels ◽  
Helium Ion

Helium Ion Irradiation Effects in ODS and Non-ODS Ferritic Steels

2011 ◽  
pp. 300-305 ◽  
Author(s):  
Ryuta Kasada ◽  
Hiromasa Takahashi ◽  
Kentaro Yutani ◽  
Hirotatsu Kishimoto ◽  
Akihiko Kimura
Keyword(s):  
Ion Irradiation ◽  
Ferritic Steels ◽  
Irradiation Effects ◽  
Helium Ion

Magnetization dynamics of irradiation-fabricated perpendicularly magnetized dots inside a softer magnetic matrix

2003 ◽  
Vol 777 ◽  
Author(s):  
T. Devolder ◽  
M. Belmeguenai ◽  
C. Chappert ◽  
H. Bernas ◽  
Y. Suzuki
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Magnetization Reversal ◽  
Ion Irradiation ◽  
Magnetic Nanostructures ◽  
Magnetic Storage ◽  
Exchange Field ◽  
Static Magnetization ◽  
Specific Domain ◽  
Helium Ion

AbstractGlobal Helium ion irradiation can tune the magnetic properties of thin films, notably their magneto-crystalline anisotropy. Helium ion irradiation through nanofabricated masks can been used to produce sub-micron planar magnetic nanostructures of various types. Among these, perpendicularly magnetized dots in a matrix of weaker magnetic anisotropy are of special interest because their quasi-static magnetization reversal is nucleation-free and proceeds by a very specific domain wall injection from the magnetically “soft” matrix, which acts as a domain wall reservoir for the “hard” dot. This guarantees a remarkably weak coercivity dispersion. This new type of irradiation-fabricated magnetic device can also be designed to achieve high magnetic switching speeds, typically below 100 ps at a moderate applied field cost. The speed is obtained through the use of a very high effective magnetic field, and high resulting precession frequencies. During magnetization reversal, the effective field incorporates a significant exchange field, storing energy in the form of a domain wall surrounding a high magnetic anisotropy nanostructure's region of interest. The exchange field accelerates the reversal and lowers the cost in reversal field. Promising applications to magnetic storage are anticipated.

Depth-dependent nanoindentation hardness of reduced-activation ferritic steels after MeV Fe-ion irradiation

2014 ◽  
Vol 89 (7-8) ◽  
pp. 1637-1641 ◽  
Author(s):  
Ryuta Kasada ◽  
Satoshi Konishi ◽  
Kiyohiro Yabuuchi ◽  
Shuhei Nogami ◽  
Masami Ando ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Ferritic Steels ◽  
Nanoindentation Hardness

The influence of helium ion irradiation on amorphous hydrocarbon films

2013 ◽  
Vol 435 (1-3) ◽  
pp. 214-221 ◽  
Author(s):  
Hongyu Fan ◽  
Li Sun ◽  
Deming Yang ◽  
Jinhai Niu ◽  
Liping Guo ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Hydrocarbon Films ◽  
Helium Ion
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