Improvement of thermal stability of exchange coupling in FeMn/NiFe films by Pt addition

2001 ◽  
Vol 89 (11) ◽  
pp. 7622-7624 ◽  
Author(s):  
Mutsuko Jimbo ◽  
Shingo Yokochi ◽  
Koji Yamagishi ◽  
Junichi Kurita
Keyword(s):  
Thermal Stability ◽  
Exchange Coupling ◽  
Thermal Stability Of

High exchange-coupling field and thermal stability of antiferromagnetic Ir-Mn pinned spin-valve films

2002 ◽  
Vol 38 (5) ◽  
pp. 2764-2766 ◽  
Author(s):  
J.Y. Hwang ◽  
M.Y. Kim ◽  
J.R. Rhee ◽  
S.S. Lee ◽  
D.G. Hwang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Exchange Coupling ◽  
Spin Valve ◽  
Coupling Field ◽  
Thermal Stability Of

Magnetic Hardening Induced by Exchange Coupling in Mechanically Milled Antiferromagnetic - Ferromagnetic Composites

1999 ◽  
Vol 581 ◽  
Author(s):  
J. Sort ◽  
J. Nogués ◽  
X. Amils ◽  
S. Suriñach ◽  
J.S. Muñoz ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Saturation Magnetization ◽  
Mechanical Milling ◽  
Exchange Coupling ◽  
Room Temperature ◽  
Weight Ratio ◽  
Broad Distribution ◽  
Energy Product ◽  
Magnetic Hardening ◽  
Thermal Stability Of

ABSTRACTMechanical milling has been used to synthesize ferromagnetic (FM, Co) - antiferromagnetic (AFM, NiO) composites. The coercivity, HC, and energy product, BHMax, of these composites can be enhanced at room temperature after appropriate heat treatments above the Néel temperature of the AFM, TN. Although the maximum Hc is achieved for the (NiO)1: 1 (Co) weight ratio, BHMax is further enhanced for the (NiO)2:3(Co) ratio, where higher saturation magnetization is obtained due to the larger amount of FM. Exchange coupling, responsible for these effects, decreases as the temperature is increased and vanishes close to TN. The thermal stability of the coercivity enhancement remains rather insensitive to the somewhat broad distribution of blocking temperatures of this system.

Improved thermal stability of synthetic ferrimagnetic media with enhanced exchange coupling strength

2002 ◽  
Vol 80 (15) ◽  
pp. 2719-2721 ◽  
Author(s):  
A. Inomata ◽  
E. N. Abarra ◽  
B. R. Acharya ◽  
A. Ajan ◽  
I. Okamoto
Keyword(s):  
Thermal Stability ◽  
Coupling Strength ◽  
Exchange Coupling ◽  
Thermal Stability Of

The Ordered Phase Formation in Ti-Al-Ga Alloys

1970 ◽  
Vol 28 ◽  
pp. 440-441
Author(s):  
Shiro Fujishiro ◽  
Harold L. Gegel
Keyword(s):  
Thermal Stability ◽  
High Temperature ◽  
Titanium Alloys ◽  
Growth Kinetics ◽  
Stoichiometric Composition ◽  
Good Potential ◽  
Alpha Titanium ◽  
Cold Rolled ◽  
Kinetics Of ◽  
Thermal Stability Of

Ordered-alpha titanium alloys having a DO19 type structure have good potential for high temperature (600°C) applications, due to the thermal stability of the ordered phase and the inherent resistance to recrystallization of these alloys. Five different Ti-Al-Ga alloys consisting of equal atomic percents of aluminum and gallium solute additions up to the stoichiometric composition, Ti3(Al, Ga), were used to study the growth kinetics of the ordered phase and the nature of its interface.The alloys were homogenized in the beta region in a vacuum of about 5×10-7 torr, furnace cooled; reheated in air to 50°C below the alpha transus for hot working. The alloys were subsequently acid cleaned, annealed in vacuo, and cold rolled to about. 050 inch prior to additional homogenization

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