By Topic

A study of magnetic hardening in Pt1-xNixFe

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Hadjipanayis, G. ; University of Manitoba, Winnipeg, MB, Canada ; Gaunt, P.

Alloys of composition Pt1-xNixFe with x = 0.2, 0.3 , and 0.4 can be quenched from high temperature to retain a face centred cubic disordered phase. On aging, at lower temperatures, alloys with x = 0.2 and 0.3 become magnetically hard with coercivities up to 2000 Oe at room temperature. In the hardened state the alloys have an ordered tetragonal structure with c/a \sim 0.96 and a uniaxial magnetocrystalline anisotropy of \sim10^{7} erg cm-3. Electron microscopy, of magnetically hard fully tetragonal samples, reveals a {110} lamellar structure. The c axis of each lamella is at 90° to the c axis of the locally dominant tetragonal matrix phase in which it is embedded. Lorentz microscopy reveals domain walls, parallel to the dominant c axis which are "kinked" where they cross lamellae. The coercive forces increase on cooling below room temperature. This increase can be attributed to the decreased probability of the thermal activation of domain wall segments, over barriers, as the temperature falls. An alloy with x = 0.4 formed a cubic ordered phase on aging but did not develop high coercivity or high remanent magnetization.

Published in:

Magnetics, IEEE Transactions on  (Volume:12 ,  Issue: 4 )