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Article: Effect of lanthanum ions on magnetic properties of Y3Fe 5O12 nanoparticles

TitleEffect of lanthanum ions on magnetic properties of Y3Fe 5O12 nanoparticles
Authors
KeywordsLa3+
Magnetic, Ferrite, Sol-Gel Method
Nanoparticles
Yttrium Iron Garnet
Issue Date2009
PublisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=1388-0764
Citation
Journal of Nanoparticle Research, 2009, v. 11 n. 5, p. 1185-1192 How to Cite?
AbstractLanthanum ion (La3+)-substituted garnet nanoparticles Y 3-x La x Fe5O12 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) were fabricated by a sol-gel method. Their crystalline structures and magnetic properties were investigated by using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Mössbauer spectrum. The XRD results show that samples of Y3-x La x Fe 5O12 (0.0 ≤ x ≤ 0.8) are all single phase and the sizes of particles range from 32 to 65 nm. Those of Y2LaFe 5O12 consisted of peaks from garnet and LaFeO3 structures. Compared to pure YIG, the saturation magnetization is larger when the La concentration x = 0.2. However, with increasing La concentration (x), it decreases obviously. Meanwhile, may be due to the enhancement of the surface spin effects, the saturation magnetization rises as the particle size is increased. Different from the pure YIG, the Mössbauer spectra of Y 2.8La0.2Fe5O12 and Y 2.2La0.8Fe5O12 are composed of four sets of six-line hyperfine patterns. The results tell us that the substitution of La3+ ions with large ionic radius (1.061 Å) will give rise to a microscopic structure distortion of the a- and d-sites to different degrees, and the Zeeman sextets from a- and d-sites begin to split into two sub-sextets, which is helpful to explain the phenomenon observed in the study of the magnetic property. © 2008 Springer Science+Business Media B.V.
Persistent Identifierhttp://hdl.handle.net/10722/92292
ISSN
2015 Impact Factor: 2.101
2015 SCImago Journal Rankings: 0.583
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China (NSFC)
Funding Information:

This work is supported by National Natural Science Foundation of China (NSFC).

References

 

DC FieldValueLanguage
dc.contributor.authorCheng, Zen_HK
dc.contributor.authorCui, Yen_HK
dc.contributor.authorYang, Hen_HK
dc.contributor.authorChen, Yen_HK
dc.date.accessioned2010-09-17T10:41:44Z-
dc.date.available2010-09-17T10:41:44Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal of Nanoparticle Research, 2009, v. 11 n. 5, p. 1185-1192en_HK
dc.identifier.issn1388-0764en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92292-
dc.description.abstractLanthanum ion (La3+)-substituted garnet nanoparticles Y 3-x La x Fe5O12 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) were fabricated by a sol-gel method. Their crystalline structures and magnetic properties were investigated by using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and Mössbauer spectrum. The XRD results show that samples of Y3-x La x Fe 5O12 (0.0 ≤ x ≤ 0.8) are all single phase and the sizes of particles range from 32 to 65 nm. Those of Y2LaFe 5O12 consisted of peaks from garnet and LaFeO3 structures. Compared to pure YIG, the saturation magnetization is larger when the La concentration x = 0.2. However, with increasing La concentration (x), it decreases obviously. Meanwhile, may be due to the enhancement of the surface spin effects, the saturation magnetization rises as the particle size is increased. Different from the pure YIG, the Mössbauer spectra of Y 2.8La0.2Fe5O12 and Y 2.2La0.8Fe5O12 are composed of four sets of six-line hyperfine patterns. The results tell us that the substitution of La3+ ions with large ionic radius (1.061 Å) will give rise to a microscopic structure distortion of the a- and d-sites to different degrees, and the Zeeman sextets from a- and d-sites begin to split into two sub-sextets, which is helpful to explain the phenomenon observed in the study of the magnetic property. © 2008 Springer Science+Business Media B.V.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=1388-0764en_HK
dc.relation.ispartofJournal of Nanoparticle Researchen_HK
dc.subjectLa3+en_HK
dc.subjectMagnetic, Ferrite, Sol-Gel Methoden_HK
dc.subjectNanoparticlesen_HK
dc.subjectYttrium Iron Garneten_HK
dc.titleEffect of lanthanum ions on magnetic properties of Y3Fe 5O12 nanoparticlesen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11051-008-9501-1en_HK
dc.identifier.scopuseid_2-s2.0-67650760018en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67650760018&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume11en_HK
dc.identifier.issue5en_HK
dc.identifier.spage1185en_HK
dc.identifier.epage1192en_HK
dc.identifier.isiWOS:000267107100016-

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