Synthesis, structural characterization and magnetic behavior of a novel phosphate: K4(Co0.25Fe0.75)4(PO4)5

被引：4
作者：
Alloun, Fouad [1 ]
Hadouchi, Mohammed [1 ]
Assani, Abderrazzak [1 ]
Saadi, Mohamed [1 ]
Lahmar, Abdelilah [2 ]
El Marssi, Mimoun [2 ]
El Ammari, Lahcen [1 ]
机构：
[1] Mohammed V Univ Rabat, Fac Sci, Ctr Sci Mat, Lab Chim Appliquee Mat, Ave Ibn Battouta BP 1014, Rabat, Morocco
[2] Lab Phys La Matiere Condensee, 33 Rue St Leu, F-80033 Amiens, France
来源：
SOLID STATE SCIENCES | 2023年 / 139卷
关键词：
Phosphate; Single crystal-based X-ray diffraction; Ferrimagnetic behavior; CRYSTAL-STRUCTURE; SODIUM INTERCALATION; K4FE4P5O20;
D O I：
10.1016/j.solidstatesciences.2023.107170
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The search for new materials and the understanding of their structure-property relationship has been the subject of many studies. In this context, a new phosphate K-4(Co0.25Fe0.75)(4)(PO4)(5) is synthesized in single crystal and powder forms. The Structural, vibrational characterization, and magnetic properties are investigated. The title phosphate crystallizes in the tetragonal system with the space group P (4) over bar 21c and unit cell parameters a = 9.7141 (2) angstrom and c = 9.4657 (3) angstrom. The structure consists of the association of (Fe/Co)O-5 trigonal bipyramids and PO4 tetrahedra resulting in an open three-dimensional structure with elliptical channels running along the [001] direction, where the cations K+ are situated. X-ray diffraction and SEM-EDS analysis were used to analyze the purity, morphology and chemical composition of the synthesized powder. Infrared and Raman spectroscopy confirms the presence of vibrational modes of PO4 tetrahedra. The magnetic susceptibility measurement indicates the appearance of ferrimagnetic behavior at Tc similar to 17 K.
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页数：9
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