Enhanced structural and magnetic ordering of FePt/TiOx bilayers by ion-beam deposition and annealing

Guijun Li; Chi Wah Leung; Yi Jing Wu; An Cheng Sun; J. H. Hsu; P. T. Lai; Ko Wei Lin; Philip W.T. Pong

doi:10.1016/j.mee.2013.01.042

Enhanced structural and magnetic ordering of FePt/TiO_x bilayers by ion-beam deposition and annealing

Guijun Li, Chi Wah Leung, Yi Jing Wu, An Cheng Sun, J. H. Hsu, P. T. Lai, Ko Wei Lin, Philip W.T. Pong

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The effect of annealing temperature on the microstructure and magnetic properties of FePt/TiO_x bilayers was systemically studied. The grain sizes decreased and the surface roughness increased as the annealing temperatures increased; at the meanwhile, the interface between the FePt and TiO_x layer became more graded, indicating there were more interdiffusion processes as the annealing temperature increased. The coercivity increased as the annealing temperature was raised, indicating more face center tetragonal-phase FePt was formed with higher annealing temperatures. Coercivities over 11 kOe were acquired in both in-plane and out-of-plane directions after annealing at 650 °C for 10 min. TiO_x-capped FePt samples tended to possess higher coercivities after annealing at higher temperatures, which is favorable for high areal density recording applications.

Original language	English (US)
Pages (from-to)	250-255
Number of pages	6
Journal	Microelectronic Engineering
Volume	110
DOIs	https://doi.org/10.1016/j.mee.2013.01.042
State	Published - 2013
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Surfaces, Coatings and Films
Electrical and Electronic Engineering

Keywords

Annealing
Coercivity
FePt
Ion-beam deposition

Access to Document

10.1016/j.mee.2013.01.042

Cite this

@article{2ff150d7d92444738ab2820dd00e1efa,

title = "Enhanced structural and magnetic ordering of FePt/TiOx bilayers by ion-beam deposition and annealing",

abstract = "The effect of annealing temperature on the microstructure and magnetic properties of FePt/TiOx bilayers was systemically studied. The grain sizes decreased and the surface roughness increased as the annealing temperatures increased; at the meanwhile, the interface between the FePt and TiOx layer became more graded, indicating there were more interdiffusion processes as the annealing temperature increased. The coercivity increased as the annealing temperature was raised, indicating more face center tetragonal-phase FePt was formed with higher annealing temperatures. Coercivities over 11 kOe were acquired in both in-plane and out-of-plane directions after annealing at 650 °C for 10 min. TiOx-capped FePt samples tended to possess higher coercivities after annealing at higher temperatures, which is favorable for high areal density recording applications.",

keywords = "Annealing, Coercivity, FePt, Ion-beam deposition",

author = "Guijun Li and Leung, {Chi Wah} and Wu, {Yi Jing} and Sun, {An Cheng} and Hsu, {J. H.} and Lai, {P. T.} and Lin, {Ko Wei} and Pong, {Philip W.T.}",

year = "2013",

doi = "10.1016/j.mee.2013.01.042",

language = "English (US)",

volume = "110",

pages = "250--255",

journal = "Microelectronic Engineering",

issn = "0167-9317",

publisher = "Elsevier",

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TY - JOUR

T1 - Enhanced structural and magnetic ordering of FePt/TiOx bilayers by ion-beam deposition and annealing

AU - Li, Guijun

AU - Leung, Chi Wah

AU - Wu, Yi Jing

AU - Sun, An Cheng

AU - Hsu, J. H.

AU - Lai, P. T.

AU - Lin, Ko Wei

AU - Pong, Philip W.T.

PY - 2013

Y1 - 2013

N2 - The effect of annealing temperature on the microstructure and magnetic properties of FePt/TiOx bilayers was systemically studied. The grain sizes decreased and the surface roughness increased as the annealing temperatures increased; at the meanwhile, the interface between the FePt and TiOx layer became more graded, indicating there were more interdiffusion processes as the annealing temperature increased. The coercivity increased as the annealing temperature was raised, indicating more face center tetragonal-phase FePt was formed with higher annealing temperatures. Coercivities over 11 kOe were acquired in both in-plane and out-of-plane directions after annealing at 650 °C for 10 min. TiOx-capped FePt samples tended to possess higher coercivities after annealing at higher temperatures, which is favorable for high areal density recording applications.

AB - The effect of annealing temperature on the microstructure and magnetic properties of FePt/TiOx bilayers was systemically studied. The grain sizes decreased and the surface roughness increased as the annealing temperatures increased; at the meanwhile, the interface between the FePt and TiOx layer became more graded, indicating there were more interdiffusion processes as the annealing temperature increased. The coercivity increased as the annealing temperature was raised, indicating more face center tetragonal-phase FePt was formed with higher annealing temperatures. Coercivities over 11 kOe were acquired in both in-plane and out-of-plane directions after annealing at 650 °C for 10 min. TiOx-capped FePt samples tended to possess higher coercivities after annealing at higher temperatures, which is favorable for high areal density recording applications.

KW - Annealing

KW - Coercivity

KW - FePt

KW - Ion-beam deposition

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