Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source

I. Jacyna, D. Klinger, J. B. Pełka, R. Minikayev, P. Dłużewski, E. Dynowska, M. Jakubowski, M. T. Klepka, D. Zymierska, A. Bartnik, Z. Kurant, A. Wolska, A. Wawro, I. Sveklo, J. R. Plaisier, D. Eichert, F. Brigidi, I. Makhotkin, A. Maziewski, R. Sobierajski (Corresponding Author)

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

We have studied the structural mechanisms responsible for the magnetic reorientation between in-plane and out-of-plane magnetization in the (25 nm Pt)/(3 and 10 nm Co)/(3 nm Pt) trilayer systems irradiated with nanosecond XUV pulses generated with laser-driven gas-puff target plasma source of a narrow continuous spectrum peaked at wavelength of 11 nm. The thickness of individual layers, their density, chemical composition and irradiation-induced lateral strain were deduced from symmetric and asymmetric X-ray diffraction (XRD) patterns, grazing-incidence X-ray reflectometry (GIXR), grazing incidence X-ray fluorescence (GIXRF), extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM) measurements. In the as grown samples we found, that the Pt buffer layers are relaxed and that the layer interfaces are sharp. As a result of a quasi-uniform irradiation of the samples, the XRD, EXAFS, GIXR and GIXRF data reveal the formation of two distinct layers composed of Pt1-xCox alloys with different Co concentrations, dependent on the thickness of the as grown magnetic Co film but with similar ∼1% lateral tensile residual strain. For smaller exposure dose (lower number of accumulated pulses) only partial interdiffusion at the interfaces takes place with the formation of a tri-layer composed of Co-Pt alloy sandwiched between thinned Pt layers, as revealed by TEM. The structural modifications are accompanied by magnetization changes, evidenced by means of magneto-optical microscopy. The difference in magnetic properties of the irradiated samples can be related to their modification in Pt1-xCox alloy composition, as the other parameters (lateral strain and alloy thickness) remain almost unchanged. The out-of-plane magnetization observed for the sample with initially 3 nm Co layer can be due to a significant reduction of demagnetization factor resulting from a lower Co concentration.

Original languageEnglish
Pages (from-to)899-908
Number of pages10
JournalJournal of alloys and compounds
Volume763
DOIs
Publication statusPublished - 30 Sep 2018

Fingerprint

Plasma sources
Laser pulses
X rays
Magnetization
Lasers
X ray absorption
Fluorescence
Irradiation
Transmission electron microscopy
X ray diffraction
Gas lasers
Demagnetization
Buffer layers
Chemical analysis
Diffraction patterns
Optical microscopy
Magnetic properties
Wavelength

Keywords

  • Alloys formation
  • Atomic diffusion
  • Magnetic reorientation
  • Ultrathin Pt/Co/Pt films
  • XUV irradiation

Cite this

Jacyna, I., Klinger, D., Pełka, J. B., Minikayev, R., Dłużewski, P., Dynowska, E., ... Sobierajski, R. (2018). Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source. Journal of alloys and compounds, 763, 899-908. https://doi.org/10.1016/j.jallcom.2018.05.314
Jacyna, I. ; Klinger, D. ; Pełka, J. B. ; Minikayev, R. ; Dłużewski, P. ; Dynowska, E. ; Jakubowski, M. ; Klepka, M. T. ; Zymierska, D. ; Bartnik, A. ; Kurant, Z. ; Wolska, A. ; Wawro, A. ; Sveklo, I. ; Plaisier, J. R. ; Eichert, D. ; Brigidi, F. ; Makhotkin, I. ; Maziewski, A. ; Sobierajski, R. / Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source. In: Journal of alloys and compounds. 2018 ; Vol. 763. pp. 899-908.
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title = "Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source",
abstract = "We have studied the structural mechanisms responsible for the magnetic reorientation between in-plane and out-of-plane magnetization in the (25 nm Pt)/(3 and 10 nm Co)/(3 nm Pt) trilayer systems irradiated with nanosecond XUV pulses generated with laser-driven gas-puff target plasma source of a narrow continuous spectrum peaked at wavelength of 11 nm. The thickness of individual layers, their density, chemical composition and irradiation-induced lateral strain were deduced from symmetric and asymmetric X-ray diffraction (XRD) patterns, grazing-incidence X-ray reflectometry (GIXR), grazing incidence X-ray fluorescence (GIXRF), extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM) measurements. In the as grown samples we found, that the Pt buffer layers are relaxed and that the layer interfaces are sharp. As a result of a quasi-uniform irradiation of the samples, the XRD, EXAFS, GIXR and GIXRF data reveal the formation of two distinct layers composed of Pt1-xCox alloys with different Co concentrations, dependent on the thickness of the as grown magnetic Co film but with similar ∼1{\%} lateral tensile residual strain. For smaller exposure dose (lower number of accumulated pulses) only partial interdiffusion at the interfaces takes place with the formation of a tri-layer composed of Co-Pt alloy sandwiched between thinned Pt layers, as revealed by TEM. The structural modifications are accompanied by magnetization changes, evidenced by means of magneto-optical microscopy. The difference in magnetic properties of the irradiated samples can be related to their modification in Pt1-xCox alloy composition, as the other parameters (lateral strain and alloy thickness) remain almost unchanged. The out-of-plane magnetization observed for the sample with initially 3 nm Co layer can be due to a significant reduction of demagnetization factor resulting from a lower Co concentration.",
keywords = "Alloys formation, Atomic diffusion, Magnetic reorientation, Ultrathin Pt/Co/Pt films, XUV irradiation",
author = "I. Jacyna and D. Klinger and Pełka, {J. B.} and R. Minikayev and P. Dłużewski and E. Dynowska and M. Jakubowski and Klepka, {M. T.} and D. Zymierska and A. Bartnik and Z. Kurant and A. Wolska and A. Wawro and I. Sveklo and Plaisier, {J. R.} and D. Eichert and F. Brigidi and I. Makhotkin and A. Maziewski and R. Sobierajski",
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Jacyna, I, Klinger, D, Pełka, JB, Minikayev, R, Dłużewski, P, Dynowska, E, Jakubowski, M, Klepka, MT, Zymierska, D, Bartnik, A, Kurant, Z, Wolska, A, Wawro, A, Sveklo, I, Plaisier, JR, Eichert, D, Brigidi, F, Makhotkin, I, Maziewski, A & Sobierajski, R 2018, 'Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source' Journal of alloys and compounds, vol. 763, pp. 899-908. https://doi.org/10.1016/j.jallcom.2018.05.314

Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source. / Jacyna, I.; Klinger, D.; Pełka, J. B.; Minikayev, R.; Dłużewski, P.; Dynowska, E.; Jakubowski, M.; Klepka, M. T.; Zymierska, D.; Bartnik, A.; Kurant, Z.; Wolska, A.; Wawro, A.; Sveklo, I.; Plaisier, J. R.; Eichert, D.; Brigidi, F.; Makhotkin, I.; Maziewski, A.; Sobierajski, R. (Corresponding Author).

In: Journal of alloys and compounds, Vol. 763, 30.09.2018, p. 899-908.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Study of ultrathin Pt/Co/Pt trilayers modified by nanosecond XUV pulses from laser-driven plasma source

AU - Jacyna, I.

AU - Klinger, D.

AU - Pełka, J. B.

AU - Minikayev, R.

AU - Dłużewski, P.

AU - Dynowska, E.

AU - Jakubowski, M.

AU - Klepka, M. T.

AU - Zymierska, D.

AU - Bartnik, A.

AU - Kurant, Z.

AU - Wolska, A.

AU - Wawro, A.

AU - Sveklo, I.

AU - Plaisier, J. R.

AU - Eichert, D.

AU - Brigidi, F.

AU - Makhotkin, I.

AU - Maziewski, A.

AU - Sobierajski, R.

PY - 2018/9/30

Y1 - 2018/9/30

N2 - We have studied the structural mechanisms responsible for the magnetic reorientation between in-plane and out-of-plane magnetization in the (25 nm Pt)/(3 and 10 nm Co)/(3 nm Pt) trilayer systems irradiated with nanosecond XUV pulses generated with laser-driven gas-puff target plasma source of a narrow continuous spectrum peaked at wavelength of 11 nm. The thickness of individual layers, their density, chemical composition and irradiation-induced lateral strain were deduced from symmetric and asymmetric X-ray diffraction (XRD) patterns, grazing-incidence X-ray reflectometry (GIXR), grazing incidence X-ray fluorescence (GIXRF), extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM) measurements. In the as grown samples we found, that the Pt buffer layers are relaxed and that the layer interfaces are sharp. As a result of a quasi-uniform irradiation of the samples, the XRD, EXAFS, GIXR and GIXRF data reveal the formation of two distinct layers composed of Pt1-xCox alloys with different Co concentrations, dependent on the thickness of the as grown magnetic Co film but with similar ∼1% lateral tensile residual strain. For smaller exposure dose (lower number of accumulated pulses) only partial interdiffusion at the interfaces takes place with the formation of a tri-layer composed of Co-Pt alloy sandwiched between thinned Pt layers, as revealed by TEM. The structural modifications are accompanied by magnetization changes, evidenced by means of magneto-optical microscopy. The difference in magnetic properties of the irradiated samples can be related to their modification in Pt1-xCox alloy composition, as the other parameters (lateral strain and alloy thickness) remain almost unchanged. The out-of-plane magnetization observed for the sample with initially 3 nm Co layer can be due to a significant reduction of demagnetization factor resulting from a lower Co concentration.

AB - We have studied the structural mechanisms responsible for the magnetic reorientation between in-plane and out-of-plane magnetization in the (25 nm Pt)/(3 and 10 nm Co)/(3 nm Pt) trilayer systems irradiated with nanosecond XUV pulses generated with laser-driven gas-puff target plasma source of a narrow continuous spectrum peaked at wavelength of 11 nm. The thickness of individual layers, their density, chemical composition and irradiation-induced lateral strain were deduced from symmetric and asymmetric X-ray diffraction (XRD) patterns, grazing-incidence X-ray reflectometry (GIXR), grazing incidence X-ray fluorescence (GIXRF), extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM) measurements. In the as grown samples we found, that the Pt buffer layers are relaxed and that the layer interfaces are sharp. As a result of a quasi-uniform irradiation of the samples, the XRD, EXAFS, GIXR and GIXRF data reveal the formation of two distinct layers composed of Pt1-xCox alloys with different Co concentrations, dependent on the thickness of the as grown magnetic Co film but with similar ∼1% lateral tensile residual strain. For smaller exposure dose (lower number of accumulated pulses) only partial interdiffusion at the interfaces takes place with the formation of a tri-layer composed of Co-Pt alloy sandwiched between thinned Pt layers, as revealed by TEM. The structural modifications are accompanied by magnetization changes, evidenced by means of magneto-optical microscopy. The difference in magnetic properties of the irradiated samples can be related to their modification in Pt1-xCox alloy composition, as the other parameters (lateral strain and alloy thickness) remain almost unchanged. The out-of-plane magnetization observed for the sample with initially 3 nm Co layer can be due to a significant reduction of demagnetization factor resulting from a lower Co concentration.

KW - Alloys formation

KW - Atomic diffusion

KW - Magnetic reorientation

KW - Ultrathin Pt/Co/Pt films

KW - XUV irradiation

U2 - 10.1016/j.jallcom.2018.05.314

DO - 10.1016/j.jallcom.2018.05.314

M3 - Article

VL - 763

SP - 899

EP - 908

JO - Journal of alloys and compounds

JF - Journal of alloys and compounds

SN - 0925-8388

ER -