Simultaneous Measurement of Magnetization and Magnetostriction in CeRu 2Si 2 at Very Low Temperatures: A Test of the One-Parameter Scaling Property

Matsuhira, Kazuyuki; Sakakibara, Toshiro; Nomachi, Akiko; Tayama, Takashi; Tenya, Kenichi; Arima, Hiroshi; Maezawa, K.; Ōnuki, Yoshichika

doi:10.1143/jpsj.68.3402

Cited by 13 publications

(10 citation statements)

References 25 publications

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“…Such proportionalities have been observed in CeRu 2 Si 2 16,33 and also in Sr 3 Ru 2 O 7 . 23 For a QCEP the susceptibility diverges by definition (4), which in turn implies a divergence in the compressibility κ.…”

Section: Universal Signatures Close To a Metamagnetic Qcepsupporting

confidence: 57%

“…In particular, the differential susceptibility at H m first increases with decreasing T but then starts to saturate at a temperature of the order of T * = 0.5 K. 13,14 In the past, the experimental results have been often interpreted within a scalingansatz for the entropy of the form S(H/H m (p), T /T 0 (p)), with the magnetic field H, temperature T , pressure dependent critical field H m (p) and the temperature scale T 0 (p). 8,[15][16][17] This phenomenological approach was quite successful to account for the observed relations between the H-dependence of various thermodynamic quantities in the low-temperature limit. However, it did not provide an explanation for the huge anomalies themselves like, for example, the large Grüneisen parameter.…”

Section: Introductionmentioning

confidence: 99%

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Universal signatures of the metamagnetic quantum critical endpoint: Application toCeRu2Si2

Weickert¹,

Brando²,

Steglich³

et al. 2010

Phys. Rev. B

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A quantum critical endpoint related to a metamagnetic transition causes distinct signatures in the thermodynamic quantities of a compound. We argue that, irrespective of the microscopic details of the considered material, the diverging differential susceptibility combined with the Ising symmetry of the endpoint give rise to a number of characteristic metamagnetic phenomena. In the presence of a magnetoelastic coupling, one finds a correspondence of susceptibility, magnetostriction and compressibility and, as a result, a pronounced crystal softening, a diverging Grüneisen parameter, a sign change of thermal expansion α(H), and a minimum in the specific heat coefficient γ(H). We illustrate these signatures and their relation on the metamagnetic crossover at 8 T in the prototypical heavy-fermion system CeRu2Si2.

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Section: Universal Signatures Close To a Metamagnetic Qcepsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Universal signatures of the metamagnetic quantum critical endpoint: Application toCeRu2Si2

Weickert¹,

Brando²,

Steglich³

et al. 2010

Phys. Rev. B

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“…A conventional example is CeRu 2 Si 2 which exhibits a sharp metamagnetic crossover at B M ¼ 7.7 T [36], where λ V is positive below and above B M [37,38]. Furthermore, the field dependence of λ V is related to the differential susceptibility χðBÞ ¼ dMðBÞ=dB by a single constant positive parameter Ω [39,40] as…”

mentioning

confidence: 99%

Antiferromagnetic Correlations in Strongly Valence Fluctuating CeIrSn

et al. 2021

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CeIrSn with a quasikagome Ce lattice in the hexagonal basal plane is a strongly valence fluctuating compound, as we confirm by hard x-ray photoelectron spectroscopy and inelastic neutron scattering, with a high Kondo temperature of T K ∼ 480 K. We report a negative in-plane thermal expansion α=T below 2 K, which passes through a broad minimum near 0.75 K. Volume and a-axis magnetostriction for Bka are markedly negative at low fields and change sign before a sharp metamagnetic anomaly at 6 T. These behaviors are unexpected for Ce-based intermediate valence systems, which should feature positive expansivity. Rather they point towards antiferromagnetic correlations at very low temperatures. This is supported by muon spin relaxation measurements down to 0.1 K, which provide microscopic evidence for a broad distribution of internal magnetic fields. Comparison with isostructural CeRhSn suggests that these antiferromagnetic correlations emerging at T ≪ T K result from geometrical frustration.

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“…In magnetic fields higher than those used in our measurements, Ã has shown a linear field dependence with a positive coefficient below 6 T and decreased to roughly zero as the field decreased to zero [26,27]. The linear field coefficient can be estimated to be $ 1:0 Â 10 À5 T À2 in the field range between 2 and 6 T at 70 mK [28]. Thus, the linear field coefficient is expected to change from negative to positive in a higher field.…”

mentioning

confidence: 66%

Novel Quantum Criticality inCeRu2Si2near Absolute Zero Observed by Thermal Expansion and Magnetostriction

et al. 2008

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We report linear thermal expansion and magnetostriction measurements for CeRu2Si2 in magnetic fields up to 52.6 mT and at temperatures down to 1 mK. At high temperatures, this compound showed Landau-Fermi-liquid behavior: The linear thermal expansion coefficient and the magnetostriction coefficient were proportional to the temperature and magnetic field, respectively. In contrast, a pronounced non-Fermi-liquid effect was found below 50 mK. The negative contribution of thermal expansion and magnetostriction suggests the existence of an additional quantum critical point.

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Simultaneous Measurement of Magnetization and Magnetostriction in CeRu₂Si₂ at Very Low Temperatures: A Test of the One-Parameter Scaling Property

Cited by 13 publications

References 25 publications

Universal signatures of the metamagnetic quantum critical endpoint: Application toCeRu2Si2

Universal signatures of the metamagnetic quantum critical endpoint: Application toCeRu2Si2

Antiferromagnetic Correlations in Strongly Valence Fluctuating CeIrSn

Novel Quantum Criticality inCeRu2Si2near Absolute Zero Observed by Thermal Expansion and Magnetostriction

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