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六方钇锰矿YMnO₃中钆取代效应的研究

Study of gadolinium substitution effects in hexagonal yttrium manganite YMnO.

作者信息

Karoblis Dovydas, Zarkov Aleksej, Garskaite Edita, Mazeika Kestutis, Baltrunas Dalis, Niaura Gediminas, Beganskiene Aldona, Kareiva Aivaras

机构信息

Institute of Chemistry, Vilnius University, Naugarduko 24, 03225, Vilnius, Lithuania.

Wood Science and Engineering, Department of Engineering Sciences and Mathematics, Luleå University of Technology, Forskargatan 1, 931 87, Skellefteå, Sweden.

出版信息

Sci Rep. 2021 Feb 3;11(1):2875. doi: 10.1038/s41598-021-82621-6.

DOI:10.1038/s41598-021-82621-6
PMID:33536490
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7859184/
Abstract

In the present work, gadolinium substitution effects on the properties of yttrium manganite YGdMnFeO (x from 0 to 1 with a step of 0.2) synthesized by an aqueous sol-gel method have been investigated. Partial substitution of Mn by Fe in the manganite was also performed in order to investigate deeper the structural properties of synthesized compounds applying Mössbauer spectroscopy. It was demonstrated that substitution of Y by Gd ions leads to the changes of structural, magnetic and morphological properties of investigated system. The crystal structure gradually transformed from hexagonal to orthorhombic with an increase of Gd content in the crystal lattice. The mixed phase was obtained when x = 0.6, whereas other compounds were determined to be monophasic. Magnetization measurements revealed paramagnetic behavior of all specimens, however magnetization values were found to be dependent on chemical composition of the samples. Solid solutions with orthorhombic structure revealed higher magnetization values compared to those of hexagonal samples. The highest magnetization was observed for pure GdMnFeO. Structural properties were investigated by powder X-ray diffraction, Mössbauer, FTIR and Raman spectroscopies. Morphological features of the synthesized specimens were studied by scanning electron microscopy (SEM).

摘要

在本工作中，研究了钆替代对通过水溶胶 - 凝胶法合成的钇锰酸盐YGdMnFeO（x从0到1，步长为0.2）性能的影响。为了通过穆斯堡尔光谱更深入地研究合成化合物的结构性质，还在锰酸盐中进行了Fe对Mn的部分替代。结果表明，Gd离子对Y的替代导致了所研究体系的结构、磁性和形态性质的变化。随着晶格中Gd含量的增加，晶体结构逐渐从六方相转变为正交相。当x = 0.6时获得混合相，而其他化合物被确定为单相。磁化测量揭示了所有样品的顺磁行为，然而发现磁化值取决于样品的化学成分。与六方样品相比，具有正交结构的固溶体显示出更高的磁化值。纯GdMnFeO的磁化值最高。通过粉末X射线衍射、穆斯堡尔、傅里叶变换红外光谱和拉曼光谱研究了结构性质。通过扫描电子显微镜（SEM）研究了合成样品的形态特征。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/e3996fec989e/41598_2021_82621_Fig10_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/74d7c58650ce/41598_2021_82621_Fig5_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/0b116e21448b/41598_2021_82621_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/c5e9dc0d09f1/41598_2021_82621_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/b5dd17719318/41598_2021_82621_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b016/7859184/e3996fec989e/41598_2021_82621_Fig10_HTML.jpg

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Novel multiferroicity in GdMnO3 thin films with self-assembled nano-twinned domains.具有自组装纳米孪晶畴的GdMnO₃薄膜中的新型多铁性
Sci Rep. 2014 Nov 12;4:7019. doi: 10.1038/srep07019.
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Materials (Basel). 2022 Oct 27;15(21):7547. doi: 10.3390/ma15217547.