Zhivulin Vladimir E, Trofimov Evgeniy A, Zaitseva Olga V, Sherstyuk Daria P, Cherkasova Natalya A, Taskaev Sergey V, Vinnik Denis A, Alekhina Yulia A, Perov Nikolay S, Naidu Kadiyala C B, Elsaeedy Hassan I, Khandaker Mayeen U, Tishkevich Daria I, Zubar Tatiana I, Trukhanov Alex V, Trukhanov Sergei V
South Ural State University, 76, Lenin Avenue, Chelyabinsk 454080, Russia.
Chelyabinsk State University, 129, Bratiev Kashirinykh St, Chelyabinsk 454001, Russia.
iScience. 2023 Jun 13;26(7):107077. doi: 10.1016/j.isci.2023.107077. eCollection 2023 Jul 21.
The polycrystalline SrFeO samples deeply substituted up to at.67% by Al, Ga, In, Co, and Cr cations with a high configurational mixing entropy were prepared by solid-phase synthesis. Phase purity and unit cell parameters were obtained from XRD and analyzed versus the average ionic radius of the iron sublattice. The crystallite size varied around ∼4.5 μm. A comprehensive study of the magnetization was realized in various fields and temperatures. The saturation magnetization was calculated using the Law of Approach to Saturation. The accompanying magnetic parameters were determined. The magnetic crystallographic anisotropy coefficient and the anisotropy field were calculated. All investigated magnetization curves turned out to be nonmonotonic. The magnetic ordering and freezing temperatures were extracted from the ZFC and FC curves. The average size of magnetic clusters varied around ∼350 nm. The high values of the configurational mixing entropy and the phenomenon of magnetic dilution were taken into account.
通过固相合成制备了多晶SrFeO样品，其中Al、Ga、In、Co和Cr阳离子的深度取代高达原子分数67%，具有高组态混合熵。从XRD获得相纯度和晶胞参数，并相对于铁亚晶格的平均离子半径进行分析。微晶尺寸在4.5μm左右变化。在不同的场和温度下对磁化进行了全面研究。使用趋近饱和定律计算饱和磁化强度。确定了伴随的磁参数。计算了磁晶各向异性系数和各向异性场。所有研究的磁化曲线均呈现非单调。从ZFC和FC曲线中提取磁有序温度和冻结温度。磁簇的平均尺寸在350nm左右变化。考虑了高组态混合熵值和磁稀释现象。
