Contribution of spin fluctuations to the low-temperature resistivity and thermopower of YCo2

Бурков, А. Т.; Nakama, Takao; Kohama, T.; Shimoji, T.; Shintani, K.; Shimabukuro, Riki; Yagasaki, Kazuyuki; Gratz, E.

doi:10.1016/s0304-8853(97)00566-0

Cited by 10 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At first, the electrical resistivity of the compounds with x = 0.2 and 0.3 slightly reduces under an applied magnetic field and then the resistivity shows a gradual growth, with a further increase of the field giving the positive value of ρ/ρ at high magnetic fields. It should be noted that the positive longitudinal magnetoresistance (it is not shown in figure 4) was also observed for the parent compound YCo 2 in previous works (see [12] for instance). Initially there may seem to be some contradiction with the current opinion that an applied field should suppress spin fluctuations in this compound and, as a consequence, should reduce its electrical resistivity.…”

Section: Resultssupporting

confidence: 76%

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Баранов

Yermakov

Podlesnyak

2003

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Results of the electrical resistivity, magnetoresistance and specific heat measurements are presented for Y1−xGdxCo2 in the vicinity of the critical Gd concentration xc ≈ 0.15 for the onset of a long-range magnetic order. Pronounced maxima of the coefficient γ of the T-linear specific heat, Debye temperature and residual resistivity as a function of concentration are found to exist at x = 0.1, i.e. just below xc. These anomalies, together with the existence of a minimum on the temperature dependences of the electrical resistivity at 0 < x < 0.15, are ascribed to the substantial influence of localized spin density fluctuations induced by f–d exchange in the itinerant d-electron subsystem of Co. The maximal extra contribution to the residual resistivity Δρresmax in Y1−xRxCo2 pseudobinaries is found to depend on the critical concentration as well as on the type of R ions, while the value of Δγmax depends only on the critical concentration of R ions. The significant upturns on Cp/T versus T2 dependences observed in Y1−xGdxCo2 at 0 < x < 0.15 may be indicative of a non-Fermi-liquid behaviour of the d-electron subsystem caused by the partial substitution of Gd for Y.

show abstract

Section: Resultssupporting

confidence: 76%

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Баранов

Yermakov

Podlesnyak

2003

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Indeed, similar behavior has been experimentally observed in some other systems with spin fluctuations [8,17,18]. From the theoretical point of view [8,18,19], there exist two different possible mechanisms (diffusion and paramagnon drag mechanisms) which can explain in equal manner the observed behavior of the thermo-power.…”

Section: Seebeck Coefficientsupporting

confidence: 74%

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points

Nouneh

Viennois

Kityk

et al. 2004

Physica Status Solidi (b)

View full text Add to dashboard Cite

The temperature dependence of the resistivity, the Seebeck coefficient and photoinduced second harmonic generation (PISHG) are studied near the quantum critical point in the skutterudite compound LaFe 4 Sb 12 , possessing increased spin fluctuations. We observed a large maximum of the PISHG at a temperature of about 15 K. The PISHG signal increases substantially below 35 K. We found a correlation between the temperature dependences of PISHG, resistivity and Seebeck coefficient. We proposed a phenomenological explanation for the occurrence of the PISHG signal in LaFe 4 Sb 12 implying strong spin fluctuations exist in this system, which may present some interest for the study of other spin fluctuation systems. Physical insight into the phenomenon observed is grounded in the participation of anharmonic electron-phonon and electron-paramagnon interactions stimulated by inducing light in the interactions with the photoexcited dipole moments.

show abstract

“…The obtained values of the A parameter coincide satisfactorily with the literature data known for YCo 2 compound (Fig. 5b, open marks) [30,37].…”

Section: Electrical Resistivitysupporting

confidence: 89%

Electrical properties and spin fluctuations studies of Y(Co1−xNix)2 compounds

Guzdek

Pszczoła

Chmist

et al. 2011

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Contribution of spin fluctuations to the low-temperature resistivity and thermopower of YCo2

Cited by 10 publications

References 5 publications

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points

Electrical properties and spin fluctuations studies of Y(Co1−xNix)2 compounds

Contact Info

Product

Resources

About

Contribution of spin fluctuations to the low-temperature resistivity and thermopower of YCo2

Cited by 10 publications

References 5 publications

Onset of magnetism in Y1 xGdxCo2: effect on the heat capacity and electrical resistivity

Onset of magnetism in Y1 xGdxCo2: effect on the heat capacity and electrical resistivity

Photoinduced second harmonic generation of LaFe4Sb12 near spin fluctuated critical points

Electrical properties and spin fluctuations studies of Y(Co1−xNix)2 compounds

Contact Info

Product

Resources

About

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Onset of magnetism in Y_1 xGd_xCo₂: effect on the heat capacity and electrical resistivity

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points