Concentration dependence of magnetic moment in Ce1-xFexO2

被引：5

作者：

Beausoleil, Geoffrey L., II ^{[1
]}

Thurber, Aaron ^{[1
]}

Rao, S. S. ^{[1
]}

Alanko, Gordon ^{[1
]}

Hanna, C. B. ^{[1
]}

Punnoose, Alex ^{[1
]}

机构：

[1] Boise State Univ, Dept Phys, Boise, ID 83725 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 07期

基金：

美国国家科学基金会;

关键词：

ROOM-TEMPERATURE FERROMAGNETISM;

D O I：

10.1063/1.3688933

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, we examined the impact of iron doping on the structural, chemical, and magnetic properties of ceria (Ce1-xFexO2). Samples were produced in triplicate through a coprecipitation approach in a forced hydrolysis synthesis that yielded consistently sized nanocrystals using three different cerium precursors: cerium chloride, cerium ammonium nitrate, and cerium nitrate. Particles were characterized by x ray diffraction (XRD), x ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, and vibrating sample magnetometry (VSM). XPS and EPR data shows iron to be in the Fe3+ state and confirms the nominal dopant concentration. The moment per Fe ion found was largest at the lowest dopant concentrations, and quickly decreased as the concentration was increased. We used XPS to estimate the Ce3+/Ce4+ ratio and observed a linear relation between the saturation magnetization and the Ce3+/Ce4+ ratio. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3688933]

引用

页数：3

共 15 条

[1] A SPECTROSCOPIC CHARACTERIZATION OF THE REDUCTION OF CERIA FROM ELECTRONIC-TRANSITIONS OF INTRINSIC POINT-DEFECTS [J].

BINET, C ;

BADRI, A ;

LAVALLEY, JC .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (25) :6392-6398

[2] STUDY BY PHOTOELECTRON-SPECTROSCOPY OF SURFACE DEGRADATION OF FES2, CUFES2 ZNS AND PBS EXPOSED TO AIR AND WATER [J].

BRION, D .

APPLICATIONS OF SURFACE SCIENCE, 1980, 5 (02) :133-152

[3]

Dohcevic-Mitrovic Z. D., 2010, APPL PHYS LETT, V96, P3

[4] On the origin of ferromagnetism in CeO2 nanocubes [J].

Ge, M. Y. ;

Wang, H. ;

Liu, E. Z. ;

Liu, J. F. ;

Jiang, J. Z. ;

Li, Y. K. ;

Xu, Z. A. ;

Li, H. Y. .

APPLIED PHYSICS LETTERS, 2008, 93 (06)

[5] Ferromagnetism in Fe-doped ZnO nanocrystals: Experiment and theory [J].

Karmakar, Debjani ;

Mandal, S. K. ;

Kadam, R. M. ;

Paulose, P. L. ;

Rajarajan, A. K. ;

Nath, T. K. ;

Das, A. K. ;

Dasgupta, I. ;

Das, G. P. .

PHYSICAL REVIEW B, 2007, 75 (14)

[6]

Li MJ, 2008, IEEE T MAGN, V44, P2708, DOI 10.1109/TMAG.2008.2003058

[7] Role of dopant incorporation on the magnetic properties of Ce1-xNixO2 nanoparticles:: An electron paramagnetic resonance study [J].

Misra, S. K. ;

Andronenko, S. I. ;

Engelhard, M. H. ;

Thurber, A. ;

Reddy, K. M. ;

Punnoose, A. .

JOURNAL OF APPLIED PHYSICS, 2008, 103 (07)

[8]

Research Article Tiwari A., 2006, APPL PHYS LETT, V88

[9]

Shah L. R., 2009, J PHYS CONDENS MATT, V21, P9

[10] Room temperature ferromagnetism in Fe-doped CeO2 thin films grown on LaAlO3 (001) [J].

Sharma, S. K. ;

Thakur, P. ;

Kumar, Shalendra ;

Shukla, D. K. ;

Brookes, N. B. ;

Lee, C. G. ;

Pirota, K. R. ;

Koo, B. H. ;

Knobel, M. .

THIN SOLID FILMS, 2010, 519 (01) :410-413

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