Manipulating magnetoelectric energy landscape in multiferroics

Huang, Yen-Lin; Nikonov, Dmitri; Addiego, Christopher; Chopdekar, Rajesh V.; Prasad, Bhagwati; Zhang, Lei; Chatterjee, Jyotirmoy; Liu, Heng-Jui; Farhan, Alan; Chu, Ying-Hao; Yang, Mengmeng; Ramesh, Maya; Qiu, Zi Qiang; Huey, Bryan D.; Lin, Chia-Ching; Gosavi, Tanay; Íñiguez, Jorge; Bokor, Jeffrey; Pan, Xiaoqing; Young, Ian; Martin, Lane W.; Ramesh, Ramamoorthy

doi:10.1038/s41467-020-16727-2

Title: Manipulating magnetoelectric energy landscape in multiferroics

Journal Article · 05 June 2020 · Nature Communications

DOI: https://doi.org/10.1038/s41467-020-16727-2 · OSTI ID:1632021

Huang, Yen-Lin ^[1];

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^[4]; Prasad, Bhagwati ^[5];

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^[8]; Chu, Ying-Hao ^[9]; Yang, Mengmeng ^[10]; Ramesh, Maya ^[11]; Qiu, Zi Qiang ^[10];

^[12]; Lin, Chia-Ching ^[2];

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^[6]; Pan, Xiaoqing ^[14];

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Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division
Intel Corp., Hillsboro, OR (United States)
Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Accelerator & Fusion Research Division
Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering
Univ. of California, Berkeley, CA (United States). Dept. of Electrical Engineering and Computer Sciences
National Chung Hsing Univ., Taichung (Taiwan). Dept. of Materials Science and Engineering
Aalto Univ., Otaniemi (Finland). School of Science
National Chaio Tung Univ., Hsinchu (Taiwan). Dept. of Materials Science and Engineering
Univ. of California, Berkeley, CA (United States). Dept. of Physics
Univ. of California, Irvine, CA (United States). Dept. of Physics
Univ. of Connecticut, Storrs, CT (United States). Dept. of Materials Science and Engineering
Luxembourg Inst. of Science and Technology (LIST), Esch-sur-Alzette (Luxembourg). Materials Research and Technology Dept.; Univ. of Luxembourg, Belvaux, (Luxembourg). Physics and Materials Science Research Unit
Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy, Dept. of Materials Science and Engineering, and Irvine Materials Research Inst.
Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Engineering and Dept. of Physics; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division

Magnetoelectric coupling at room temperature in multiferroic materials, such as BiFeO₃, is one of the leading candidates to develop low-power spintronics and emerging memory technologies. Although extensive research activity has been devoted recently to exploring the physical properties, especially focusing on ferroelectricity and antiferromagnetism in chemically modified BiFeO₃, a concrete understanding of the magnetoelectric coupling is yet to be fulfilled. We have discovered that La substitutions at the Bi-site lead to a progressive increase in the degeneracy of the potential energy landscape of the BiFeO₃ system exemplified by a rotation of the polar axis away from the ⟨111⟩_pc towards the ⟨112⟩_pc discretion. This is accompanied by corresponding rotation of the antiferromagnetic axis as well, thus maintaining the right-handed vectorial relationship between ferroelectric polarization, antiferromagnetic vector and the Dzyaloshinskii-Moriya vector. As a consequence, La-BiFeO₃ films exhibit a magnetoelectric coupling that is distinctly different from the undoped BiFeO₃ films.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Laboratory Directed Research and Development (LDRD) Program; Intel Corp.

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1632021

Alternate ID(s):: OSTI ID: 1637323

Journal Information:: Nature Communications, Vol. 11, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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