Muon spin relaxation study of non-Fermi-liquid behavior near the ferromagnetic quantum critical point in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mtext>CePd</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.15</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Rh</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.85</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Adroja, D. T.; Hillier, A. D.; Park, J.-G.; Kockelmann, W.; McEwen, K.A.; Rainford, B.D.; Jang, Kwang-Ho; Geibel, C.; Takabatake, Toshiro

doi:10.1103/physrevb.78.014412

Cited by 31 publications

(28 citation statements)

References 71 publications

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“…6(c). A good fit is obtained for λ 0 = 0.0015 μs −1 , = 3.7 G, and τ C = 15 × 10 −8 s. The observed value of τ C in CeNiC 2 is comparable with that observed in CePd 0.15 Rh 0.85 [25].…”

Section: Muon Spin Relaxationsupporting

confidence: 71%

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μSRand inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnetCeNiC2

et al. 2014

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The magnetic state of the noncentrosymmetric antiferromagnet CeNiC 2 has been studied by magnetic susceptibility, heat capacity, muon spin relaxation (μSR), and inelastic neutron scattering (INS) measurements. CeNiC 2 exhibits three magnetic phase transitions at T N 1 = 19.5 K, T N 2 = 10 K, and T N 3 = 2.5 K. The presence of long-range magnetic order below 20 K is confirmed by the observation of oscillations in the μSR spectra between 10 and 20 K and a sharp increase in the muon depolarization rate. INS studies reveal two well-defined crystal electric field (CEF) excitations around 8 and 30 meV. INS data have been analyzed using a CEF model and the wave functions were evaluated. We also calculated the direction and magnitude of the ground state moment using CEF wave functions and compare the results with that proposed from the neutron diffraction. Our CEF model correctly predicts that the moments order along the b axis (or y axis) and the estimated magnetic moment is 0.687(5)μ B , which is higher than the moment observed from the neutron diffraction (0.25μ B /Ce). We attribute the observed reduced moment due to the Kondo screening effect.A. BHATTACHARYYA et al. PHYSICAL REVIEW B 90, 054405 (2014)

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Section: Muon Spin Relaxationsupporting

confidence: 71%

“…The parameters were estimated by a simultaneous fit to the INS data at 25 and 100 K and then fitting the single-crystal susceptibility. 25 and 100 K…”

Section: Inelastic Neutron Scatteringmentioning

confidence: 99%

μSRand inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnetCeNiC2

et al. 2014

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“…3b, where [25], and matches the exponent determined from the static susceptibility in this region. However, our small value for β (0.3 compared to 1.3 for CePd 1-x Rh x ) and the combined value of γ + β ≈ 1 prevent us from distinguishing fluctuations originating from quantum critical behavior or local moment ordering [24].…”

Section: Discussionsupporting

confidence: 55%

Competing interactions and magnetic frustration in Yb4LiGe4

et al. 2011

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We have studied polycrystalline Yb 4 LiGe 4 , a ternary variant of the R 5 T 4 family of layered compounds characterized by a very strong coupling between the magnetic and crystallographic degrees of freedom. The system is mixed valent, with non-magnetic Yb 2+ and magnetic Yb 3+ present, and is characterized by coexisting ferromagnetic and antiferromagnetic correlations. We present measurements of resistivity, AC-susceptibility, specific heat, and muon spin relaxation (μSR), below 1 K. The low temperature measurements suggest a transition to a mesoscopically inhomogeneous magnetically ordered state below 2 K characterized by fluctuations well below the ordering temperature. This unusual state is believed to result from the enhanced twodimensionality produced by Li substitution and frustration effects inherent in the Yb sub-lattice geometry.2

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“…In a number of quantum ferromagnetic materials the temperature dependence of the muon spin relaxation rate also obeys a power law (above the Curie temperature if there is ferromagnetic ordering). Experimental values of the exponent are −0.8 in CePd 0.15 Rh 0.85 [20], −0.33…”

Section: Methodsmentioning

confidence: 95%

Anomalous quantum critical spin dynamics in YFe2Al10

et al. 2018

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We report results of a muon spin relaxation (µSR) study of YFe 2 Al 10 , a quasi-2D nearlyferromagnetic metal in which unconventional quantum critical behavior is observed. No static Fe 2+ magnetism, with or without long-range order, is found down to 19 mK. The dynamic muon spin relaxation rate λ exhibits power-law divergences in temperature and magnetic field, the latter for fields that are too weak to affect the electronic spin dynamics directly. We attribute this to the proportionality of λ(ω µ , T ) to the dynamic structure factor S(ω µ , T ), where ω µ ≈ 10 5 -10 7 s −1 is the muon Zeeman frequency. These results suggest critical divergences of S(ω µ , T ) in both temperature and frequency. Power-law scaling and a 2D dissipative quantum XY (2D-DQXY) model both yield forms for S(ω, T ) that agree with neutron scattering data (ω ≈ 10 12 s −1 ). Extrapolation to µSR frequencies agrees semi-quantitatively with the observed temperature dependence of λ(ω µ , T ), but predicts frequency independence for ω µ ≪ T in extreme disagreement with experiment. We conclude that the quantum critical spin dynamics of YFe 2 Al 10 are not well understood at low frequencies.

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Muon spin relaxation study of non-Fermi-liquid behavior near the ferromagnetic quantum critical point inCePd0.15Rh0.85

Cited by 31 publications

References 71 publications

μSRand inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnetCeNiC2

μSRand inelastic neutron scattering investigations of the noncentrosymmetric antiferromagnetCeNiC2

Competing interactions and magnetic frustration in Yb4LiGe4

Anomalous quantum critical spin dynamics in YFe2Al10

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