Heterogeneous phase formation in diluted magnetic semiconducting Zn1−x−yCoxAlyO (CAZO) nanoparticles

R. Siddheswaran; R. Medlín; P. Bělský; V. Vavruňková; J. Očenášek; B. David; P. Šutta

doi:10.1039/C4RA02973A

Heterogeneous phase formation in diluted magnetic semiconducting Zn_1−x−yCo_xAl_yO (CAZO) nanoparticles†

R. Siddheswaran,*^a R. Medlín,^a P. Bělský,^a V. Vavruňková,^a J. Očenášek,^a B. David^b and P. Šutta^a

* Corresponding authors

^a New Technologies Research Centre, University of West Bohemia in Pilsen, Plzeň-30614, Czech Republic
E-mail: rsiddhes@yahoo.com, rajendra@ntc.zcu.cz
Fax: +420377634702
Tel: +420-726914771

^b CEITEC IPM, Institute of Physics of Materials, ASCR, v.v.i., Žižkova 22, CZ-61662 Brno, Czech Republic

Abstract

This article reports a systematic investigation of the synthesis and structural characterization of composite CAZO [(Zn_1−x−yCo_xAl_yO; x = 0.04, 0.03, 0.02; y = 0.01, 0.02, 0.03)] nanoparticles from combustion. The crystalline phase, morphology, size, and structure were characterized using X-ray diffraction (XRD), small and wide angle X-ray scattering (SAXS/WAXS), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HR-TEM). The XRD and SAXS/WAXS analyses confirm the formation of the Co and Al co-doped ZnO hexagonal wurtzite structure with an additional metal oxide phase. The particle size and micro-strain were calculated by means of an integral breadth of X-ray diffraction lines. The selected area electron diffraction (SAED) patterns from TEM were correlated with the XRD patterns. The energy dispersive X-ray spectra (EDX) from SEM/TEM were recorded in order to analyze the composition of elements in the composite. The vibrational modes of the functional groups presented in the materials were assigned from FTIR and Raman spectra. The magnetic hysteresis measurement confirmed the room temperature ferromagnetism.

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Article information

DOI: https://doi.org/10.1039/C4RA02973A
Article type: Paper
Submitted: 03 Apr 2014
Accepted: 15 May 2014
First published: 16 May 2014

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RSC Adv., 2014,4, 23405-23411

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Heterogeneous phase formation in diluted magnetic semiconducting Zn_1−x−yCo_xAl_yO (CAZO) nanoparticles

R. Siddheswaran, R. Medlín, P. Bělský, V. Vavruňková, J. Očenášek, B. David and P. Šutta, RSC Adv., 2014, 4, 23405 DOI: 10.1039/C4RA02973A

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