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Frustrated 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 | 2005 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | Magnetism of the simplest layered cobaltite LixCoO2 with x=1.0, 0.95, and 0.7 has been investigated by positive muon spin rotation and relaxation (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 (=Tcun) 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+), a spin state transition (t6/2g->t5/2ge1g), or an appearance of magnetic Co3+ at surface 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 x0.75. For Li-deficient LixCoO2 samples, T 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 | American Physical Society | |
| dc.subject.en | Magnetic phase boundaries | |
| dc.subject.en | Muon spin rotation | |
| dc.subject.en | Relaxation | |
| dc.subject.en | Spin-density waves | |
| dc.subject.en | Thermoelectric and thermomagnetic effects | |
| dc.title.en | Frustrated magnetism in the two-dimensional triangular lattice of LixCoO2 | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.72.144424 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | p. 144424 (9 p.) | |
| bordeaux.volume | vol. 72, n° 14 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00019116 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Non spécifiée | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00019116v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2005&rft.volume=vol.%2072,%20n%C2%B0%2014&rft.spage=p.%20144424%20(9%20p.)&rft.epage=p.%20144424%20(9%20p.)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=SUGIYAMA,%20J.&NOZAKI,%20H.&BREWER,%20J.%20H.&ANSALDO,%20E.%20J.&MORRIS,%20G.%20D.&rft.genre=article |
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