铁掺杂BCT陶瓷中磁离子氧化态依赖的磁电耦合强度

Magnetic ion oxidation state dependent magnetoelectric coupling strength in Fe doped BCT ceramics.

作者信息

Chawla Aanchal, Singh Anupinder, Babu P D, Singh Mandeep

机构信息

Material Science and Characterization Laboratory, Department of Physics, Guru Nanak Dev University Amritsar Punjab 143005 India

UGC-DAE Consortium for Scientific Research R-5 Shed, BARC Mumbai 400085 India.

出版信息

RSC Adv. 2020 Jun 4;10(35):21019-21027. doi: 10.1039/d0ra00969e. eCollection 2020 May 27.

DOI:10.1039/d0ra00969e

PMID:35517732

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9054350/

Abstract

Polycrystalline samples of BaCaTiFeO were prepared using a conventional solid state reaction route with different Fe starting precursors (FeO, FeO). The Rietveld refined XRD data confirmed the phase purity and tetragonal crystal structure of both the samples. The average grain size measured using SEM was ≈0.40 μm in both the samples. XPS analysis confirmed the presence of only Fe and both Fe/Fe in FeO and FeO doped BCT samples. The and values have been measured to be 1.34 μC cm, 2.88 μC cm and 0.0015 emu g and 0.135 emu g in FeO and FeO doped BCT samples, respectively. The FeO doped samples exhibit much better M-E coupling (≈22%) as compared to FeO (≈7%) doped BCT samples. The results obtained hence suggest that FeO doping in BCT is better suited for multiferroic applications.

摘要

采用传统的固态反应路线，使用不同的铁起始前驱体（FeO、FeO）制备了BaCaTiFeO的多晶样品。Rietveld精修的XRD数据证实了两个样品的相纯度和四方晶体结构。使用扫描电子显微镜测量的两个样品的平均晶粒尺寸约为0.40μm。XPS分析证实，在FeO和FeO掺杂的BCT样品中仅存在Fe以及Fe²⁺/Fe³⁺。在FeO和FeO掺杂的BCT样品中，测得的Ps值分别为1.34μC/cm²、2.88μC/cm²，Ms值分别为0.0015emu/g和0.135emu/g。与FeO（约7%）掺杂的BCT样品相比，FeO掺杂的样品表现出更好的磁电耦合（约22%）。因此，所得结果表明，BCT中掺杂FeO更适合于多铁性应用。