We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fabrication and high-resolution electron microscopy study of Fe Pt L1<sub>0</sub>/ A1 graded exchange spring media.
- Authors
Lee, Jehyun; Dymerska, Barbara; Fidler, Josef; Alexandrakis, Vasilis; Speliotis, Thanassis; Niarchos, Dimitris; Pongratz, Peter; Suess, Dieter
- Abstract
We have prepared FePt L10/A1 exchange spring graded media by controlling deposition temperature. The performance of the media was determined by the deposition conditions, particularly the cooling rate. By varying the deposition conditions a coercivity of 4.0 kOe was achieved without loss in remanent magnetization, the value corresponds to 88% reduction compared with that of FePt L10 single phase (32.2 kOe). High-resolution transmission electron microscopy (HRTEM) investigations have revealed that this drastic coercivity reduction originates from the unique microstructure of the specimens: coexistence of the L10 and A1 phases at the interphase boundary. In this region the two phases are dispersed one into another like inclusions in a matrix. Finally, the role of the complicated phase boundary on switching field reduction was discussed using micromagnetic simulations.
- Subjects
MAGNETIC recording media; ELECTRON microscopy; MAGNETIZATION; NANOSTRUCTURES; MATERIALS science
- Publication
Physica Status Solidi. A: Applications & Materials Science, 2013, Vol 210, Issue 7, p1305
- ISSN
1862-6300
- Publication type
Article
- DOI
10.1002/pssa.201228731