Magnetic Domain Structure of Fe3Al Alloy with Two-Phase Mixture Studied by Lorentz Microscopy

1985 ◽  
Vol 24 (Part 1, No. 12) ◽  
pp. 1632-1636 ◽  
Author(s):  
Denjiro Watanabe ◽  
Masayuki Yamato ◽  
Hajime Yuzurihara ◽  
Takashi Sekiguchi ◽  
Toshiro Tanaka ◽  
...  
Keyword(s):  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Domain Structure ◽  
Two Phase ◽  
Lorentz Microscopy ◽  
Phase Mixture ◽  
Fe3al Alloy

scholarly journals Observation of Magnetic Domain Structure in Fe81B15Si4 Amorphous Alloy by Lorentz Microscopy and Electron Holography

2009 ◽  
Vol 50 (12) ◽  
pp. 2839-2843 ◽  
Author(s):  
Masahiro Hiraoka ◽  
Zentaro Akase ◽  
Daisuke Shindo ◽  
Yuichi Ogawa ◽  
Yoshihito Yoshizawa
Keyword(s):  
Amorphous Alloy ◽  
Domain Structure ◽  
Magnetic Domain ◽  
Magnetic Domain Structure ◽  
Electron Holography ◽  
Lorentz Microscopy

HREM and LORENTZ Microscopy Studies on Sm(Co,Cu,Fe,Zr)z High Temperature Permanent Magnets

2001 ◽  
Vol 7 (S2) ◽  
pp. 206-207
Author(s):  
Y. Zhang ◽  
W. Tang ◽  
G.C. Hadjipanayis ◽  
C. Chen ◽  
J.F. Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Domain Structure ◽  
Department Of Defense ◽  
Permanent Magnets ◽  
Critical Role ◽  
Magnetic Domain ◽  
Temperature Stability ◽  
Magnetic Domain Structure ◽  
Lorentz Microscopy ◽  
Magnetic Hardening

Sm(Co,Cu,Fe,Zr)z 2:17 based permanent magnets have the highest Curie temperature and the most excellent temperature stability among the current rare-earth permanent magnets. in recent years, the Sm(Co,Cu,Fe,Zr)z magnets have attracted again considerable attention due to the demand of the Department of Defense for high temperature applications such as aircraft, spacecraft and ship systems. Our recent studies have led to the development of new precipitation hardened Sm(Co,Fe,Cu,Zr)z magnets with operating temperatures above 400°C and with coercivities as high as 10 kOe at 500°C. The microstructure of the Sm(Co,Cu,Fe,Zr)z high temperature magnets consists of a cellular structure (2:17 rhomobohedral cells surrounded by 1:5 hexagonal cell walls) superimposed on a lamella phase (2:17 hexagonal). This microstructure is sensitive to processing and to the alloy chemical composition. Magnetic domain structure studies play a critical role in understanding the magnetic hardening behavior of the magnets. in this paper, HREM and magnetic domain structure were studied in these Sm(Co,Cu,Fe,Zr) high temperature permanent magnets.

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