Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi

Shumpei Fujii; Takamasa Usami; Yu Shiratsuchi; Adam M. Kerrigan; Amran Mahfudh Yatmeidhy; Shinya Yamada; Takeshi Kanashima; Ryoichi Nakatani; Vlado K. Lazarov; Tamio Oguchi; Yoshihiro Gohda; Kohei Hamaya

doi:10.1038/s41427-022-00389-1

Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co₂FeSi

Shumpei Fujii, Takamasa Usami, Yu Shiratsuchi, Adam M. Kerrigan, Amran Mahfudh Yatmeidhy, Shinya Yamada, Takeshi Kanashima, Ryoichi Nakatani, Vlado K. Lazarov, Tamio Oguchi, Yoshihiro Gohda, Kohei Hamaya^*

^*Corresponding author for this work

Physics

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

Abstract

To overcome a bottleneck in spintronic applications such as those of ultralow-power magnetoresistive random-access memory devices, the electric-field control of magnetization vectors in ferromagnetic electrodes has shown much promise. Here, we show the giant converse magnetoelectric (CME) effect in a multiferroic heterostructure consisting of the ferromagnetic Heusler alloy Co₂FeSi and ferroelectric-oxide Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PMN-PT) for electric-field control of magnetization vectors. Using an in-plane uniaxial magnetic anisotropy of polycrystalline Co₂FeSi film grown on PMN-PT(011), the nonvolatile and repeatable magnetization vector switchings in remanent states are demonstrated. The CME coupling coefficient of the polycrystalline Co₂FeSi/PMN-PT(011) is over 1.0 × 10⁻⁵s/m at room temperature, comparable to those of single-crystalline Fe_1-xGa_x/PMN-PT systems. The giant CME effect has been demonstrated by the strain-induced variation in the magnetic anisotropy energy of Co₂FeSi with an L2₁-ordered structure. This approach can lead to a new solution to the reduction in the write power in spintronic memory architectures at room temperature.

Original language	English
Article number	43
Number of pages	11
Journal	NPG Asia Materials
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41427-022-00389-1
Publication status	Published - 20 May 2022

Bibliographical note

Funding Information:
The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology.

Funding Information:
The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology.

Publisher Copyright:
© 2022, The Author(s).

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Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi
© The Author(s) 2022
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Cite this

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title = "Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi",

abstract = "To overcome a bottleneck in spintronic applications such as those of ultralow-power magnetoresistive random-access memory devices, the electric-field control of magnetization vectors in ferromagnetic electrodes has shown much promise. Here, we show the giant converse magnetoelectric (CME) effect in a multiferroic heterostructure consisting of the ferromagnetic Heusler alloy Co2FeSi and ferroelectric-oxide Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) for electric-field control of magnetization vectors. Using an in-plane uniaxial magnetic anisotropy of polycrystalline Co2FeSi film grown on PMN-PT(011), the nonvolatile and repeatable magnetization vector switchings in remanent states are demonstrated. The CME coupling coefficient of the polycrystalline Co2FeSi/PMN-PT(011) is over 1.0 × 10−5s/m at room temperature, comparable to those of single-crystalline Fe1-xGax/PMN-PT systems. The giant CME effect has been demonstrated by the strain-induced variation in the magnetic anisotropy energy of Co2FeSi with an L21-ordered structure. This approach can lead to a new solution to the reduction in the write power in spintronic memory architectures at room temperature.",

author = "Shumpei Fujii and Takamasa Usami and Yu Shiratsuchi and Kerrigan, {Adam M.} and Yatmeidhy, {Amran Mahfudh} and Shinya Yamada and Takeshi Kanashima and Ryoichi Nakatani and Lazarov, {Vlado K.} and Tamio Oguchi and Yoshihiro Gohda and Kohei Hamaya",

note = "Funding Information: The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology. Funding Information: The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology. Publisher Copyright: {\textcopyright} 2022, The Author(s).",

year = "2022",

month = may,

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doi = "10.1038/s41427-022-00389-1",

language = "English",

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T1 - Giant converse magnetoelectric effect in a multiferroic heterostructure with polycrystalline Co2FeSi

AU - Fujii, Shumpei

AU - Usami, Takamasa

AU - Shiratsuchi, Yu

AU - Kerrigan, Adam M.

AU - Yatmeidhy, Amran Mahfudh

AU - Yamada, Shinya

AU - Kanashima, Takeshi

AU - Nakatani, Ryoichi

AU - Lazarov, Vlado K.

AU - Oguchi, Tamio

AU - Gohda, Yoshihiro

AU - Hamaya, Kohei

N1 - Funding Information: The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology. Funding Information: The authors appreciate Dr. Irene Azaceta of University of York for sample preparation related to TEM observations. This work was partly supported by JST CREST, Grant Number JPMJCR18J1, JSPS KAKENHI Grant Numbers 19H05616, 20K21002, 21K14196, and the Spintronics Research Network of Japan (Spin-RNJ). Some of the calculations were carried out on supercomputers at ISSP, The University of Tokyo, and TSUBAME, Tokyo Institute of Technology. Publisher Copyright: © 2022, The Author(s).

PY - 2022/5/20

Y1 - 2022/5/20

N2 - To overcome a bottleneck in spintronic applications such as those of ultralow-power magnetoresistive random-access memory devices, the electric-field control of magnetization vectors in ferromagnetic electrodes has shown much promise. Here, we show the giant converse magnetoelectric (CME) effect in a multiferroic heterostructure consisting of the ferromagnetic Heusler alloy Co2FeSi and ferroelectric-oxide Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) for electric-field control of magnetization vectors. Using an in-plane uniaxial magnetic anisotropy of polycrystalline Co2FeSi film grown on PMN-PT(011), the nonvolatile and repeatable magnetization vector switchings in remanent states are demonstrated. The CME coupling coefficient of the polycrystalline Co2FeSi/PMN-PT(011) is over 1.0 × 10−5s/m at room temperature, comparable to those of single-crystalline Fe1-xGax/PMN-PT systems. The giant CME effect has been demonstrated by the strain-induced variation in the magnetic anisotropy energy of Co2FeSi with an L21-ordered structure. This approach can lead to a new solution to the reduction in the write power in spintronic memory architectures at room temperature.

AB - To overcome a bottleneck in spintronic applications such as those of ultralow-power magnetoresistive random-access memory devices, the electric-field control of magnetization vectors in ferromagnetic electrodes has shown much promise. Here, we show the giant converse magnetoelectric (CME) effect in a multiferroic heterostructure consisting of the ferromagnetic Heusler alloy Co2FeSi and ferroelectric-oxide Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) for electric-field control of magnetization vectors. Using an in-plane uniaxial magnetic anisotropy of polycrystalline Co2FeSi film grown on PMN-PT(011), the nonvolatile and repeatable magnetization vector switchings in remanent states are demonstrated. The CME coupling coefficient of the polycrystalline Co2FeSi/PMN-PT(011) is over 1.0 × 10−5s/m at room temperature, comparable to those of single-crystalline Fe1-xGax/PMN-PT systems. The giant CME effect has been demonstrated by the strain-induced variation in the magnetic anisotropy energy of Co2FeSi with an L21-ordered structure. This approach can lead to a new solution to the reduction in the write power in spintronic memory architectures at room temperature.

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