Magnetic anisotropy of Co/Ni/Co/Pt multilayers

P.J.H. Bloemen, W.J.M. de Jonge

Research output: Contribution to journalLetterAcademicpeer-review

11 Citations (Scopus)

Abstract

The magnetic anisotropy and saturation magnetization of a series of 30 × (2 Å Co+x Å Ni+2 Å Co+10 Å Pt) multilayers, grown in the (111) orientation, has been investigated for Ni thickness ranging from 2 to 56 Å. Vibrating sample magnetometry showed that the easy axis of the multilayers switches from perpendicular to along the film-plane above a Ni thickness of 48 Å. The fact that this transition takes place at a thickness much larger than for example observed for Co/Pd or Co/Pt multilayers, is because in the present multilayers the relatively low shape anisotropy of the Ni is combined with the large Co/Pt surface anisotropy. From the measurements a value for the Co/Ni surface anisotropy of (0.29±0.06) mJ/m2, favouring a perpendicular easy axis, is estimated. Also results on X-ray diffraction, Kerr rotation and temperature dependent magnetization experiments are presented.

LanguageEnglish
PagesL1-L6
JournalJournal of Magnetism and Magnetic Materials
Volume116
Issue number1-2
DOIs
StatePublished - 1 Oct 1992

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Magnetic anisotropy
Multilayers
anisotropy
Anisotropy
Saturation magnetization
magnetization
magnetic measurement
Magnetization
switches
Switches
saturation
X ray diffraction
diffraction
x rays
Experiments
Temperature
temperature

Cite this

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title = "Magnetic anisotropy of Co/Ni/Co/Pt multilayers",
abstract = "The magnetic anisotropy and saturation magnetization of a series of 30 × (2 {\AA} Co+x {\AA} Ni+2 {\AA} Co+10 {\AA} Pt) multilayers, grown in the (111) orientation, has been investigated for Ni thickness ranging from 2 to 56 {\AA}. Vibrating sample magnetometry showed that the easy axis of the multilayers switches from perpendicular to along the film-plane above a Ni thickness of 48 {\AA}. The fact that this transition takes place at a thickness much larger than for example observed for Co/Pd or Co/Pt multilayers, is because in the present multilayers the relatively low shape anisotropy of the Ni is combined with the large Co/Pt surface anisotropy. From the measurements a value for the Co/Ni surface anisotropy of (0.29±0.06) mJ/m2, favouring a perpendicular easy axis, is estimated. Also results on X-ray diffraction, Kerr rotation and temperature dependent magnetization experiments are presented.",
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Magnetic anisotropy of Co/Ni/Co/Pt multilayers. / Bloemen, P.J.H.; de Jonge, W.J.M.

In: Journal of Magnetism and Magnetic Materials, Vol. 116, No. 1-2, 01.10.1992, p. L1-L6.

Research output: Contribution to journalLetterAcademicpeer-review

TY - JOUR

T1 - Magnetic anisotropy of Co/Ni/Co/Pt multilayers

AU - Bloemen,P.J.H.

AU - de Jonge,W.J.M.

PY - 1992/10/1

Y1 - 1992/10/1

N2 - The magnetic anisotropy and saturation magnetization of a series of 30 × (2 Å Co+x Å Ni+2 Å Co+10 Å Pt) multilayers, grown in the (111) orientation, has been investigated for Ni thickness ranging from 2 to 56 Å. Vibrating sample magnetometry showed that the easy axis of the multilayers switches from perpendicular to along the film-plane above a Ni thickness of 48 Å. The fact that this transition takes place at a thickness much larger than for example observed for Co/Pd or Co/Pt multilayers, is because in the present multilayers the relatively low shape anisotropy of the Ni is combined with the large Co/Pt surface anisotropy. From the measurements a value for the Co/Ni surface anisotropy of (0.29±0.06) mJ/m2, favouring a perpendicular easy axis, is estimated. Also results on X-ray diffraction, Kerr rotation and temperature dependent magnetization experiments are presented.

AB - The magnetic anisotropy and saturation magnetization of a series of 30 × (2 Å Co+x Å Ni+2 Å Co+10 Å Pt) multilayers, grown in the (111) orientation, has been investigated for Ni thickness ranging from 2 to 56 Å. Vibrating sample magnetometry showed that the easy axis of the multilayers switches from perpendicular to along the film-plane above a Ni thickness of 48 Å. The fact that this transition takes place at a thickness much larger than for example observed for Co/Pd or Co/Pt multilayers, is because in the present multilayers the relatively low shape anisotropy of the Ni is combined with the large Co/Pt surface anisotropy. From the measurements a value for the Co/Ni surface anisotropy of (0.29±0.06) mJ/m2, favouring a perpendicular easy axis, is estimated. Also results on X-ray diffraction, Kerr rotation and temperature dependent magnetization experiments are presented.

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U2 - 10.1016/0304-8853(92)90130-G

DO - 10.1016/0304-8853(92)90130-G

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SP - L1-L6

JO - Journal of Magnetism and Magnetic Materials

T2 - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 1-2

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