Microstructure and in-plane component of L10-FePt films deposited on MgO and MgAl2O4 substrates. (15th March 2017)

• Record Type: Journal Article
• Authors: Sepehri-Amin, H.; Iwama, H.; Ohkubo, T.; Shima, T.; Hono, K.
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 247
• Page End: 251
• Publication Date: 2017-03-15
• Subjects: FePt -- Microstructure -- In-plane coercivity -- Lattice mismatch; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.12.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Microstructures of FePt films deposited on MgO and MgAl2 O4 single crystalline substrates were studied using aberration corrected scanning transmission electron microscopy (STEM). The [100] and [010] variants of L10 -FePt were observed in-the-plane of the FePt grains deposited on the MgAl2 O4 substrate, which causes in-plane component in magnetization curves. The d-spacing of the (002) planes of L10 -FePt deposited on MgAl2 O4 is larger than that deposited on MgO. The reduction of lattice mismatch between FePt and the substrate results in the formation of out-of-plane tensile strain leading to increase in d 002 and the formation of the in-plane variants in the L10 -FePt grains. Graphical abstract: