Magnetic susceptibility and surface properties of EuAlO3 nanocrystals

被引：16
|
作者：
Petrov, D. [1 ]
Angelov, B. [1 ]
Lovchinov, V. [2 ]
机构：
[1] Univ Food Technol, Dept Inorgan & Phys Chem, Plovdiv 4002, Bulgaria
[2] Bulgarian Acad Sci, Inst Solid State Phys, BU-1784 Sofia, Bulgaria
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 16期
关键词：
Nanostructured material; Rare earth compound; Sol-gel process; Magnetic measurement; XPS;
D O I：
10.1016/j.jallcom.2011.02.003
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Nanocrystalline single-phase europium aluminate (EuAlO3) has been synthesized by modified sol-gel method with a new complexing agent - malic acid. The material has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy-dispersive analysis (EDS). The nanoparticles have an average size of 50 nm, a density of 7.01 g/cm(3) at T = 293 K, a specific surface area 15.0 m(2)/g and form agglomerates. The binding energies of core-level electrons of europium, aluminium, and oxygen in EuAlO3 have been found by means of X-ray photoelectron spectroscopy (XPS) and compared with the values for the respective elements. The temperature dependence between 300K and 2K of the experimental AC magnetic susceptibility of EuAlO3 nanocrystals has been determined and compared with the theoretical one for Eu3+. It has been confirmed that the material is paramagnetic in the entire temperature range. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：5038 / 5041
页数：4
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