Tuning the Magnetization of Manganese (II) Carbonate by Intracrystalline Amino Acids. Issue 34 (27th July 2022)

• Record Type: Journal Article
• Authors: Lang, Arad; Polishchuk, Iryna; Confalonieri, Giorgia; Dejoie, Catherine; Maniv, Ariel; Potashnikov, Daniel; Caspi, El'ad N.; Pokroy, Boaz
• Is Part Of: Advanced materials. Volume 34:Issue 34(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-07-27
• Subjects: amino acids -- bioinspiration -- Dzyaloshinskii–Moriya interaction -- magnetic properties; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202201652
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Incorporation of organic molecules into the lattice of inorganic crystalline hosts is a common phenomenon in biomineralization and is shown to alter various properties of the crystalline host. Taking this phenomenon as a source of inspiration, it is shown herein that incorporation of specific single amino acids into the lattice of manganese (II) carbonate strongly alters its inherent magnetic properties. At room temperature, the magnetic susceptibility of the amino‐acid‐incorporating paramagnetic MnCO3 decreases, following a simple rule of mixtures. When cooled below the Néel temperature, however, the opposite trend is observed, namely an increase in magnetic susceptibility measured in a high magnetic field. Such an increase, accompanied by a drastic change in the Néel phase transformation temperature, results from a decrease in MnCO3 orbital overlapping and the weakening of superexchange interactions. It may be that this is the first time that the magnetic properties of a host crystal are tuned via the incorporation of amino acids. Abstract : The bioinspired strategy of intracrystalline amino acids incorporation can be utilized to tune the magnetic properties of a crystalline host whereby both the magnetic susceptibility and Néel temperature of MnCO3 change due to the incorporation of aspartic acid. These changes are attributed to the weakening of the Dzyaloshinskii–Moriya interaction, which results from the incorporation‐induced lattice expansion.