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合成云母中的二维到三维磁性

2D to 3D Magnetism in Synthetic Micas.

作者信息

Rosas-Huerta José Luis, Wolber Jonas, Minaud Claire, Fabelo Oscar, Ritter Clemens, Mentré Olivier, Arévalo-López Ángel M

机构信息

Unité de Catalyse et Chimie du Solide (UCCS) - Université de Lille - Centrale Lille, Université Artois, ENSCL, UMR CNRS 8181, Lille, F-59000, France.

Institut Laue-Langevin, BP 156, Grenoble, Cedex, 38042, France.

出版信息

Adv Sci (Weinh). 2024 Nov;11(42):e2408266. doi: 10.1002/advs.202408266. Epub 2024 Sep 20.

DOI:10.1002/advs.202408266
PMID:39301880
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11558087/
Abstract

Fe-based mica minerals usually display two opposing magnetic ground states, either they behave as spin-glasses or as layered ferrimagnets. No definite reason has been proposed as an explanation for this duality. This conundrum is unraveled by comparing the synthetic micas KFe[MGe]OX with M═Fe and Ga, X═OH and F. Neutron diffraction demonstrates a 2D to 3D magnetic transition in KFe[FeGe]O(OH) while just hints or no order at all are observed for the fluorides with M═Fe and Ga respectively. The 3D transition is triggered by the presence of iron in the intralayer tetrahedra. DFT+U calculations show that the magnetic exchange couplings between the previously believed solely magnetic octahedral layers would otherwise be frustrated without this intralayer iron.

摘要

铁基云母矿物通常呈现出两种相反的磁性基态，它们要么表现为自旋玻璃，要么表现为层状亚铁磁体。对于这种二元性，尚未提出明确的原因来解释。通过比较合成云母KFe[MGe]OX（其中M = Fe和Ga，X = OH和F）解开了这个谜团。中子衍射表明，KFe[FeGe]O(OH)中存在二维到三维的磁性转变，而对于分别含有M = Fe和Ga的氟化物，仅观察到微弱的有序或根本没有有序现象。三维转变是由层内四面体中铁的存在引发的。密度泛函理论+U计算表明，如果没有这种层内铁，先前认为仅由磁性八面体层之间的磁交换耦合将会受到阻碍。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/56e22c607f9b/ADVS-11-2408266-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/9d1b7846a205/ADVS-11-2408266-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/4b400484e3a0/ADVS-11-2408266-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/56e22c607f9b/ADVS-11-2408266-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/9d1b7846a205/ADVS-11-2408266-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/4b400484e3a0/ADVS-11-2408266-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7f64/11558087/56e22c607f9b/ADVS-11-2408266-g004.jpg

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本文引用的文献

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Inorg Chem. 2024 May 20;63(20):9184-9194. doi: 10.1021/acs.inorgchem.4c00679. Epub 2024 May 9.
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Multivalued Memory via Freezing of Super-Hard Magnetic Domains in a Quasi 2D-Magnet.
Small Methods. 2023 Nov;7(11):e2300491. doi: 10.1002/smtd.202300491. Epub 2023 Jul 25.
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Charge order and three-site distortions in the Verwey structure of magnetite.电荷有序和磁铁矿维氏结构中的三点畸变。
Nature. 2011 Dec 21;481(7380):173-6. doi: 10.1038/nature10704.
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Formation of pancakelike Ising domains and giant magnetic coercivity in ferrimagnetic LuFe2O4.
Phys Rev Lett. 2008 Sep 26;101(13):137203. doi: 10.1103/PhysRevLett.101.137203. Epub 2008 Sep 24.
5
The Structure of the Micas and Related Minerals.云母及相关矿物的结构
Proc Natl Acad Sci U S A. 1930 Feb;16(2):123-9. doi: 10.1073/pnas.16.2.123.