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Frustated magnetism in the two-dimensional triangular lattice of LixCoO2
| hal.structure.identifier | Central Research and Development Laboratory | |
| dc.contributor.author | SUGIYAMA, J. | |
| hal.structure.identifier | Central Research and Development Laboratory | |
| dc.contributor.author | NOZAKI, H. | |
| hal.structure.identifier | Canadian Institute for Advanced Research [CIFAR] | |
| hal.structure.identifier | Department of Physics and Astronomy [Vancouver] | |
| hal.structure.identifier | TRIUMF [Vancouver] | |
| dc.contributor.author | BREWER, J. H. | |
| hal.structure.identifier | TRIUMF [Vancouver] | |
| dc.contributor.author | ANSALDO, E. J. | |
| hal.structure.identifier | TRIUMF [Vancouver] | |
| dc.contributor.author | MORRIS, G. D. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DELMAS, Claude | |
| dc.date.issued | 2006 | |
| dc.identifier.issn | 0921-4526 | |
| dc.description.abstractEn | Magnetism of the simplest layered cobalt oxide, LixCoO2 with x=1.0, 0.95, and 0.7, has been investigated by µ+ SR spectroscopy together with magnetic susceptibility measurements, using polycrystalline samples in the temperature range between 300 and 1.8 K. Weak transverse field µ+ SR showed the appearance of magnetism below ~65 K (=T on c) for the sample with x=1.0. The volume fraction of the magnetic phase at 1.8 K is determined to be ~20 % for LiCoO2, strongly suggesting that the observed magnetism is not induced by impurities but is an intrinsic behavior. This indicates that either a charge disproportionation (2Co3+→Co2++Co4+) or a spin state transition (t 6 2g -> t 5 2g e 1g) occurs below 65 K. Zero field µ+ SR spectra of LiCoO2 consist mainly of a slow relaxing signal due to random fields, even at 1.8 K, plus a small amount of a fast relaxing signal and an oscillating component, implying the presence of an antiferromagnetic order, as in the case of NaxCoO2 with x > 0.75. For Li-deficient LixCoO2 samples, T on c decreases with decreasing x from 50 K for x=0.95 to 25 K for x=0.7. The volume fraction of the magnetic phase is however almost independent of x and is estimated as 20% at 1.8 K, but no oscillations were observed in the zero field spectrum. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Muon spin rotation and relaxation | |
| dc.subject.en | Critical phenomena | |
| dc.subject.en | Antiferromagnet | |
| dc.title.en | Frustated magnetism in the two-dimensional triangular lattice of LixCoO2 | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.physb.2005.11.039 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Physica B: Condensed Matter | |
| bordeaux.page | p. 148-151 | |
| bordeaux.volume | 374-375 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00115414 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00115414v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physica%20B:%20Condensed%20Matter&rft.date=2006&rft.volume=374-375&rft.spage=p.%20148-151&rft.epage=p.%20148-151&rft.eissn=0921-4526&rft.issn=0921-4526&rft.au=SUGIYAMA,%20J.&NOZAKI,%20H.&BREWER,%20J.%20H.&ANSALDO,%20E.%20J.&MORRIS,%20G.%20D.&rft.genre=article |
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