Evolution of Magnetism Induced by K+/La3+ Implantations in Double Perovskite Ba2MnTeO6

IF 4.7 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-06-24 DOI:10.1021/acsaelm.4c00401

Haipeng You, Yixiao Chen, Yue Li, Jun Chen, Xiyu Chen, Meifeng Liu, Shuai Dong, Jin Peng

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Abstract

B-site rock salt type ordered double perovskites with general formula A₂B′B″X₆ have attracted a variety of attention due to remarkable magnetic properties and potential applications in spintronics. Here we report the structural, magnetic, and electronic properties of polycrystalline compounds Ba₂MnTeO₆ and (Ba_0.9X_0.1)₂MnTeO₆ (X = K/La) by powder X-ray diffraction, magnetic susceptibility measurements, specific heat measurements, and X-ray photoelectron spectroscopy. Ba₂MnTeO₆ is antiferromagnetically ordered below 20 K. Density functional theory calculations show that Ba₂MnTeO₆ prefers type III antiferromagnetic order with a dominant antiferromagnetic nearest-neighbor exchange and a weak ferromagnetic next-nearest-neighbor exchange. Our Monte Carlo simulations lead to a transition temperature of 28 K, consistent with the experimental results. Upon K⁺/La³⁺ cations’ implantation on Ba sites, while (Ba_0.9K_0.1)₂MnTeO₆ orders antiferromagnetically at 20 K, (Ba_0.9La_0.1)₂MnTeO₆ exhibits superparamagnetism below room temperature, which may originate from oxygen ion adsorptions. These findings reveal the modulation of magnetism for Ba₂MnTeO₆, which may hint at potential applications of double perovskites in magnetic devices.

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双包晶石 Ba2MnTeO6 中 K+/La3+ 植入诱导的磁性演变

通式为 A2B′B″X6 的 B 位岩盐型有序双高晶石因其显著的磁性能和在自旋电子学中的潜在应用而受到广泛关注。在此，我们通过粉末 X 射线衍射、磁感应强度测量、比热测量和 X 射线光电子能谱，报告了多晶化合物 Ba2MnTeO6 和 (Ba0.9X0.1)2MnTeO6 （X = K/La）的结构、磁性和电子特性。密度泛函理论计算表明，Ba2MnTeO6 更倾向于 III 型反铁磁有序，其中反铁磁近邻交换占主导地位，而铁磁近邻交换较弱。蒙特卡洛模拟得出的转变温度为 28 K，与实验结果一致。当 K+/La3+ 阳离子植入 Ba 位点时，(Ba0.9K0.1)2MnTeO6 在 20 K 时具有反铁磁性，而(Ba0.9La0.1)2MnTeO6 在室温以下则表现出超顺磁性，这可能源于氧离子的吸附作用。这些发现揭示了 Ba2MnTeO6 的磁性调制，这可能暗示了双包晶在磁性器件中的潜在应用。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico

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