Fabrication of L 10-type FeCo ordered structure using a periodic Ni buffer layer

Hisaaki Ito; Masahiro Saito; Toshio Miyamachi; Fumio Komori; Tomoyuki Koganezawa; Masaki Mizuguchi; Masato Kotsugi

doi:10.1063/1.5079982

Fabrication of L 1₀-type FeCo ordered structure using a periodic Ni buffer layer

Hisaaki Ito, Masahiro Saito, Toshio Miyamachi, Fumio Komori, Tomoyuki Koganezawa, Masaki Mizuguchi, Masato Kotsugi

Collaborative Research Center on Energy Materials

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

Abstract

We experimentally prepared a ferromagnet with an L1₀-FeCo ordered structure by inserting a periodic buffer layer to suppress the B2 structural transition and to maintain the L1₀ structure. The sample was fabricated by utilizing a technique involving the deposition of alternating monoatomic layers using pulsed laser deposition (PLD). This technique was used to deposit a thin film of (7 ML-FeCo/3 ML-buffer)₃, in which either Cu or Ni was utilized as buffer layer. We characterized the surface roughness, surface morphology, lattice structure, and magnetic properties of the specimens by RHEED, AFM, SR-XRD, and SQUID, respectively. As a result, we successfully confirmed the construction of the L1₀-FeCo superstructure with a periodic Ni buffer layer for the first time. Both the magnetic moment and magnetic anisotropy were also increased by replacing Cu with Ni.

Original language	English
Article number	045307
Journal	AIP Advances
Volume	9
Issue number	4
DOIs	https://doi.org/10.1063/1.5079982
Publication status	Published - 2019 Apr 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1063/1.5079982

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@article{b606a193ba5c4eacab032cdde3dc0a5b,

title = "Fabrication of L 10-type FeCo ordered structure using a periodic Ni buffer layer",

abstract = "We experimentally prepared a ferromagnet with an L10-FeCo ordered structure by inserting a periodic buffer layer to suppress the B2 structural transition and to maintain the L10 structure. The sample was fabricated by utilizing a technique involving the deposition of alternating monoatomic layers using pulsed laser deposition (PLD). This technique was used to deposit a thin film of (7 ML-FeCo/3 ML-buffer)3, in which either Cu or Ni was utilized as buffer layer. We characterized the surface roughness, surface morphology, lattice structure, and magnetic properties of the specimens by RHEED, AFM, SR-XRD, and SQUID, respectively. As a result, we successfully confirmed the construction of the L10-FeCo superstructure with a periodic Ni buffer layer for the first time. Both the magnetic moment and magnetic anisotropy were also increased by replacing Cu with Ni.",

author = "Hisaaki Ito and Masahiro Saito and Toshio Miyamachi and Fumio Komori and Tomoyuki Koganezawa and Masaki Mizuguchi and Masato Kotsugi",

note = "Funding Information: This work was supported by the Japan Society for the Promotion of Science KAKENHI for Young Scientists (A) program (24684029), Grant-in-Aid for Scientific Research (B) program (16H03873), and shared use of IMR of Tohoku University (Proposal No. 16K0103). The magnetization measurements using a SQUID magnetometer were conducted at ISSP of the University of Tokyo. The XRD measurements using synchrotron radiation were performed at BL46XU in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI, Proposal No. 2012A1076, 2012B1214, 2013A1366, 2013B1222, 2014A1280, 2014B1503, 2015A1516, 2015B1304, 2016A1156, 2016B1185, 2017A1078, 2017A1600, 2017A1784, 2017B1588, and 2017B1814). Publisher Copyright: {\textcopyright} 2019 Author(s).",

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doi = "10.1063/1.5079982",

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AU - Ito, Hisaaki

AU - Saito, Masahiro

AU - Miyamachi, Toshio

AU - Komori, Fumio

AU - Koganezawa, Tomoyuki

AU - Mizuguchi, Masaki

AU - Kotsugi, Masato

N1 - Funding Information: This work was supported by the Japan Society for the Promotion of Science KAKENHI for Young Scientists (A) program (24684029), Grant-in-Aid for Scientific Research (B) program (16H03873), and shared use of IMR of Tohoku University (Proposal No. 16K0103). The magnetization measurements using a SQUID magnetometer were conducted at ISSP of the University of Tokyo. The XRD measurements using synchrotron radiation were performed at BL46XU in SPring-8 with the approval of the Japan Synchrotron Radiation Research Institute (JASRI, Proposal No. 2012A1076, 2012B1214, 2013A1366, 2013B1222, 2014A1280, 2014B1503, 2015A1516, 2015B1304, 2016A1156, 2016B1185, 2017A1078, 2017A1600, 2017A1784, 2017B1588, and 2017B1814). Publisher Copyright: © 2019 Author(s).

PY - 2019/4/1

Y1 - 2019/4/1

N2 - We experimentally prepared a ferromagnet with an L10-FeCo ordered structure by inserting a periodic buffer layer to suppress the B2 structural transition and to maintain the L10 structure. The sample was fabricated by utilizing a technique involving the deposition of alternating monoatomic layers using pulsed laser deposition (PLD). This technique was used to deposit a thin film of (7 ML-FeCo/3 ML-buffer)3, in which either Cu or Ni was utilized as buffer layer. We characterized the surface roughness, surface morphology, lattice structure, and magnetic properties of the specimens by RHEED, AFM, SR-XRD, and SQUID, respectively. As a result, we successfully confirmed the construction of the L10-FeCo superstructure with a periodic Ni buffer layer for the first time. Both the magnetic moment and magnetic anisotropy were also increased by replacing Cu with Ni.

AB - We experimentally prepared a ferromagnet with an L10-FeCo ordered structure by inserting a periodic buffer layer to suppress the B2 structural transition and to maintain the L10 structure. The sample was fabricated by utilizing a technique involving the deposition of alternating monoatomic layers using pulsed laser deposition (PLD). This technique was used to deposit a thin film of (7 ML-FeCo/3 ML-buffer)3, in which either Cu or Ni was utilized as buffer layer. We characterized the surface roughness, surface morphology, lattice structure, and magnetic properties of the specimens by RHEED, AFM, SR-XRD, and SQUID, respectively. As a result, we successfully confirmed the construction of the L10-FeCo superstructure with a periodic Ni buffer layer for the first time. Both the magnetic moment and magnetic anisotropy were also increased by replacing Cu with Ni.

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