Controlling the crystallographic orientation and the axis of magnetic anisotropy in L10 FePt films

J. S. Chen; B. C. Lim; J. P. Wang

doi:10.1063/1.1504489

Controlling the crystallographic orientation and the axis of magnetic anisotropy in L1₀ FePt films

J. S. Chen, B. C. Lim, J. P. Wang

Electrical and Computer Engineering

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Abstract

L1₀ ordered FePt films with (200) or (001) preferred orientations and longitudinal or perpendicular anisotropy have been prepared by dc magnetron sputtering. Different base pressures for sputtering were controlled by air feeding. The fct-FePt film exhibits (200) preferred orientation and has longitudinal anisotropy at the base pressure of 4×10^-6Torr. As the base pressure is improved (below 9×10^-7Torr), the fct-FePt films exhibit (001) preferred orientation and has perpendicular anisotropy. When the CrRu underlayer thickness decreases from 80 to 30 nm, an improved fct-FePt (001) orientation is obtained. The atmospheric constituents such as oxygen and nitrogen play an important role in controlling the crystallographic orientation and axis of magnetic anisotropy.

Original language	English (US)
Pages (from-to)	1848-1850
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	10
DOIs	https://doi.org/10.1063/1.1504489
State	Published - Sep 2 2002

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abstract = "L10 ordered FePt films with (200) or (001) preferred orientations and longitudinal or perpendicular anisotropy have been prepared by dc magnetron sputtering. Different base pressures for sputtering were controlled by air feeding. The fct-FePt film exhibits (200) preferred orientation and has longitudinal anisotropy at the base pressure of 4×10-6Torr. As the base pressure is improved (below 9×10-7Torr), the fct-FePt films exhibit (001) preferred orientation and has perpendicular anisotropy. When the CrRu underlayer thickness decreases from 80 to 30 nm, an improved fct-FePt (001) orientation is obtained. The atmospheric constituents such as oxygen and nitrogen play an important role in controlling the crystallographic orientation and axis of magnetic anisotropy.",

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AB - L10 ordered FePt films with (200) or (001) preferred orientations and longitudinal or perpendicular anisotropy have been prepared by dc magnetron sputtering. Different base pressures for sputtering were controlled by air feeding. The fct-FePt film exhibits (200) preferred orientation and has longitudinal anisotropy at the base pressure of 4×10-6Torr. As the base pressure is improved (below 9×10-7Torr), the fct-FePt films exhibit (001) preferred orientation and has perpendicular anisotropy. When the CrRu underlayer thickness decreases from 80 to 30 nm, an improved fct-FePt (001) orientation is obtained. The atmospheric constituents such as oxygen and nitrogen play an important role in controlling the crystallographic orientation and axis of magnetic anisotropy.

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Controlling the crystallographic orientation and the axis of magnetic anisotropy in L1₀ FePt films

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