Emergence of Antiferromagnetic Correlation in LiTi2-xVxO4 via 7Li NMR

Itoh, Yutaka; Moritsu, N.; Yoshimura, Kazuyoshi

doi:10.1143/jpsj.77.123713

Cited by 7 publications

(6 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence it can be said that anomalous quantum criticality is observed in Y-0.4 compound. Such features are not uncommon and have been reported in other compounds [30].…”

Section: Resultssupporting

confidence: 64%

Observation of field induced anomalous quantum criticality in Ce0.6Y0.4NiGe2 compound

Singh

Mukherjee

2019

Physics Letters A

View full text Add to dashboard Cite

We report the results of our investigation of magnetization and heat capacity on a series of compounds Ce 1-x Y x NiGe 2 (x = 0.1, 0.2 and 0.4) under the influence of external magnetic field.Our studies of the thermodynamic quantity -dM/dT on these compounds indicate that magnetic frustration persists in Ce 0.9 Y 0.1 NiGe 2 , as also reported for the parent compound CeNiGe 2 . The weak signature of this frustration is also noted in Ce 0.8 Y 0.2 NiGe 2 , whereas, it is suppressed in Ce 0.6 Y 0.4 NiGe 2 . Heat capacity studies on Ce 0.9 Y 0.1 NiGe 2 and Ce 0.8 Y 0.2 NiGe 2 indicate the presence of a new magnetic anomaly at high field which indicates that quantum criticality is absent in these compounds. However, for Ce 0.6 Y 0.4 NiGe 2 such an anomaly is not noted. For this later compound, the magnetic field (H) and temperature (T) dependence of heat capacity and magnetization obey H/T scaling above critical fields. However, the obtained scaling critical parameter (δ) is 1.6, which is away from mean field value of 3. This deviation suggests the presence of unusual fluctuations and anomalous quantum criticality in these compounds. This unusual fluctuation may arise from disorderness induced by Y-substitution.

show abstract

“…Hence it can be said that anomalous quantum criticality is observed in Y-0.4 compound. Such features are not uncommon and have been reported in other compounds [30].…”

Section: Resultssupporting

confidence: 64%

Observation of field induced anomalous quantum criticality in Ce0.6Y0.4NiGe2 compound

Singh

Mukherjee

2019

Physics Letters A

View full text Add to dashboard Cite

show abstract

“…short-range AFM ordering has been reported in V-doped LTO by nuclear magnetic resonance 11 and in LiV 2 O 4 by inelastic neutron scattering 46 . Note that the AMR measurements cannot be used to tell whether the AFM is static or dynamic.…”

Section: Discussionmentioning

confidence: 98%

“…4(c)], but we cannot tell whether it is Curie-Weiss-like or not due to the fact that it is difficult to cleanly separate a possible signal from the substrate. The emergence of short-range antiferromagnetic ordering has been reported in V-doped LTO by nuclear magnetic resonance (30) and in LiV 2 O 4 by inelastic neutron scattering (31). Perhaps, a new theoretical study is in order as to whether local spin scattering or fluctuations could result in a smooth change of the sign of the MR. Another possible explanation of the present MR behavior is grain boundary scattering.…”

Section: (B)mentioning

confidence: 96%

See 1 more Smart Citation

Anomalous magnetoresistance in the spinel superconductor LiTi2O4

Jin

Zhang

et al. 2015

Nat Commun

View full text Add to dashboard Cite

LiTi 2 O 4 is a unique compound in that it is the only known spinel oxide superconductor. The lack of high quality single crystals has thus far prevented systematic investigations of its transport properties. Here we report a careful study of transport and tunnelling spectroscopy in epitaxial LiTi 2 O 4 thin films. An unusual magnetoresistance is observed which changes from nearly isotropic negative to prominently anisotropic positive as the temperature is decreased. We present evidence that shows that the negative magnetoresistance likely stems from the suppression of local spin fluctuations or spin-orbit scattering centres. The positive magnetoresistance suggests the presence of an orbital-related state, also supported by the fact that the superconducting energy gap decreases as a quadratic function of magnetic field. These observations indicate that the spin-orbital fluctuations play an important role in LiTi 2 O 4 in a manner similar to high-temperature superconductors.

show abstract

“…T c and electrical properties of lithium titanate drastically changes with fluctuation of stoichiometry. It is reported in the literature, that maximum of superconducting transition temperature T c = 13 K is found for x close zero (0 6 x 6 0.1) [3][4][5]. Depending on x parameter, lithium titanate can exhibit metallic (x = 0) or insulating (x = 0.33) properties at room temperature [4,6,7].…”

Section: Introductionmentioning

confidence: 99%