Controlling the Magnetic Properties of the van der Waals Multiferroic Crystals Co1–xNixI2

Article Article scientifique Article Controlling the Magnetic Properties of the van der Waals Multiferroic Crystals Co1–xNixI2 eng 2024-06-12 2024-06-25 author Lukovkina Anastasiia Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 402397 Département de physique de la matière quantique (FIMAC) author Lopez Paz Sara Almudena Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 986166 author Besnard Céline 0000-0001-5699-9675 Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 682138 Administration de la section de chimie (CHIAD) author Guenee Laure Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 115015 Département de chimie minérale et analytique (CHIAM) author von Rohr Fabian 0000-0003-0422-6042 Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 973176 Département de physique de la matière quantique (FIMAC) Fabian Oliver Von Rohr author Giannini Enrico 0000-0003-3536-4771 Department of Quantum Matter Physics, University of Geneva, CH-1211 Geneva, Switzerland 503364 Département de physique de la matière quantique (FIMAC) 6237-6245 10.1021/acs.chemmater.4c01053 0897-4756 https://pubs.acs.org/doi/10.1021/acs.chemmater.4c01053 The structurally related compounds NiI2 and CoI2 are multiferroic van der Waals materials in which helimagnetic orders exist simultaneously with electric polarization. Here, we report on the evolution of the crystal structure and of the magnetic properties across solid solution Co1–xNixI2. We have successfully grown crystals of the whole range of the solid solution, i.e., x = 0–1, by employing the self-selecting vapor growth (SSVG) technique and by carefully tuning the synthesis conditions according to the chemical composition. Our structural investigations show that the crystal symmetry changes from P3̅m1 to R3̅m when Ni substitutes for Co beyond x = 0.2. Both the lattice parameters and magnetic properties evolve continuously and smoothly from one end member to the other, showing that they can be finely tuned by the chemical composition. We also observe that the degree of Ni substitution in the solid solution affects the metamagnetic transition typical for CoI2 at high magnetic fields. In particular, we find the existence of a metamagnetic transition similar to that for CoI2 in the NiI2 structure. Based on magnetic measurements, we construct the phase diagram of the Co1–xNixI2 system. Controlling the magnetic properties by the chemical composition may open new pathways for the fabrication of electronic devices made of two-dimensional (2D) flakes of multiferroic van der Waals materials. Dewey 500.2 Swiss National Science Foundation Discovery of Topological Superconductivity by Combining Physical and Chemical Design Principles 194183 CH Careers Swiss National Science Foundation Novel Magnetic and Topological 2D Materials (MAGICAL 2D) 204065 CH Projects 33 Département de physique de la matière quantique 131 false 1383 Groupe von Rohr Chemistry of materials 36 12 40018b27-db41-445c-89d1-ae45cd979f55 Article (Published version) Restricted lukovkina-et-al-2024-controlling-th.pdf 6002118 application/pdf 2b56e537540dd126ee850bedf6666c277743e8cc1b785973a1596b45576d2e49 restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Controlling the Magnetic Properties of the van der Waals Multiferroic Crystals Co_1–xNi_xI₂	Chemistry of materials			2024	149	0

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Lukovkina, Anastasiia