Observation of uniaxial anisotropy along the [100] direction in crystalline Fe film

Seul Ki Bac, Hakjoon Lee, Sangyoep Lee, Seonghoon Choi, Taehee Yoo, Sang Hoon Lee, X. Liu, J. K. Furdyna

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We report an observation of uniaxial magnetic anisotropy along the [100] crystallographic direction in crystalline Fe film grown on Ge buffers deposited on a (001) GaAs substrate. As expected, planar Hall resistance (PHR) measurements reveal the presence of four in-plane magnetic easy axes, indicating the dominance of the cubic anisotropy in the film. However, systematic mapping of the PHR hysteresis loops observed during magnetization reversal at different field orientations shows that the easy axes along the and are not equivalent. Such breaking of the cubic symmetry can only be ascribed to the presence of uniaxial anisotropy along the direction of the Fe film. Analysis of the PHR data measured as a function of orientation of the applied magnetic field allowed us to quantify the magnitude of this uniaxial anisotropy field as Oe. Although this value is only 1.5% of cubic anisotropy field, its presence significantly changes the process of magnetization reversal, revealing the important role of the uniaxial anisotropy in Fe films. Breaking of the cubic symmetry in the Fe film deposited on a Ge buffer is surprising, and we discuss possible reason for this unexpected behavior.

Original languageEnglish
Article number17761
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Dec 4

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Hall resistance
anisotropy
buffers
magnetization
symmetry
hysteresis
magnetic fields

ASJC Scopus subject areas

  • General

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Observation of uniaxial anisotropy along the [100] direction in crystalline Fe film. / Bac, Seul Ki; Lee, Hakjoon; Lee, Sangyoep; Choi, Seonghoon; Yoo, Taehee; Lee, Sang Hoon; Liu, X.; Furdyna, J. K.

In: Scientific Reports, Vol. 5, 17761, 04.12.2015.

Research output: Contribution to journalArticle

Bac, Seul Ki ; Lee, Hakjoon ; Lee, Sangyoep ; Choi, Seonghoon ; Yoo, Taehee ; Lee, Sang Hoon ; Liu, X. ; Furdyna, J. K. / Observation of uniaxial anisotropy along the [100] direction in crystalline Fe film. In: Scientific Reports. 2015 ; Vol. 5.
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abstract = "We report an observation of uniaxial magnetic anisotropy along the [100] crystallographic direction in crystalline Fe film grown on Ge buffers deposited on a (001) GaAs substrate. As expected, planar Hall resistance (PHR) measurements reveal the presence of four in-plane magnetic easy axes, indicating the dominance of the cubic anisotropy in the film. However, systematic mapping of the PHR hysteresis loops observed during magnetization reversal at different field orientations shows that the easy axes along the and are not equivalent. Such breaking of the cubic symmetry can only be ascribed to the presence of uniaxial anisotropy along the direction of the Fe film. Analysis of the PHR data measured as a function of orientation of the applied magnetic field allowed us to quantify the magnitude of this uniaxial anisotropy field as Oe. Although this value is only 1.5{\%} of cubic anisotropy field, its presence significantly changes the process of magnetization reversal, revealing the important role of the uniaxial anisotropy in Fe films. Breaking of the cubic symmetry in the Fe film deposited on a Ge buffer is surprising, and we discuss possible reason for this unexpected behavior.",
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AU - Lee, Sangyoep

AU - Choi, Seonghoon

AU - Yoo, Taehee

AU - Lee, Sang Hoon

AU - Liu, X.

AU - Furdyna, J. K.

PY - 2015/12/4

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