Magnetizing lead-free halide double perovskites

Weihua Ning; Jinke Bao; Yuttapoom Puttisong; Fabrizo Moro; Libor Kobera; Seiya Shimono; Linqin Wang; Fuxiang Ji; Maria Cuartero; Shogo Kawaguchi; Sabina Abbrent; Hiroki Ishibashi; Roland De Marco; Irina A Bouianova; Gaston A Crespo; Yoshiki Kubota; Jiri Brus; Duck Young Chung; Licheng Sun; Weimin M Chen; Mercouri G Kanatzidis; Feng Gao

doi:10.1126/sciadv.abb5381

Magnetizing lead-free halide double perovskites

Sci Adv. 2020 Nov 6;6(45):eabb5381. doi: 10.1126/sciadv.abb5381. Print 2020 Nov.

Authors

Weihua Ning¹, Jinke Bao², Yuttapoom Puttisong¹, Fabrizo Moro¹, Libor Kobera³, Seiya Shimono⁴, Linqin Wang⁵, Fuxiang Ji¹, Maria Cuartero⁵, Shogo Kawaguchi⁶, Sabina Abbrent³, Hiroki Ishibashi⁷, Roland De Marco⁸, Irina A Bouianova¹, Gaston A Crespo⁵, Yoshiki Kubota⁷, Jiri Brus³, Duck Young Chung², Licheng Sun^{5

9}, Weimin M Chen¹, Mercouri G Kanatzidis^{2

10}, Feng Gao¹¹

Affiliations

¹ Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping SE-581 83, Sweden.
² Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
³ Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovskeho nam. 2, 162 06 Prague 6, Czech Republic.
⁴ Department of Materials Science and Engineering, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan.
⁵ Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden.
⁶ Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Sayo, Hyogo 679-5198, Japan.
⁷ Department of Physical Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan.
⁸ Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, 90 Sippy Downs Drive, Sippy Downs, QLD 4556, Australia.
⁹ Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University, Hangzhou 310024, China.
¹⁰ Department of Chemistry, Northwestern University, Evanston, IL 60208, USA.
¹¹ Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping SE-581 83, Sweden. feng.gao@liu.se.

Abstract

Spintronics holds great potential for next-generation high-speed and low-power consumption information technology. Recently, lead halide perovskites (LHPs), which have gained great success in optoelectronics, also show interesting magnetic properties. However, the spin-related properties in LHPs originate from the spin-orbit coupling of Pb, limiting further development of these materials in spintronics. Here, we demonstrate a new generation of halide perovskites, by alloying magnetic elements into optoelectronic double perovskites, which provide rich chemical and structural diversities to host different magnetic elements. In our iron-alloyed double perovskite, Cs₂Ag(Bi:Fe)Br₆, Fe³⁺ replaces Bi³⁺ and forms FeBr₆ clusters that homogenously distribute throughout the double perovskite crystals. We observe a strong temperature-dependent magnetic response at temperatures below 30 K, which is tentatively attributed to a weak ferromagnetic or antiferromagnetic response from localized regions. We anticipate that this work will stimulate future efforts in exploring this simple yet efficient approach to develop new spintronic materials based on lead-free double perovskites.

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