Field dependences of magnetization and specific-heat coefficient in a nearly magnetic system: Liquid<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>and strong Pauli paramagnets

Béal-Monod, M. T.; Daniel, E.

doi:10.1103/physrevb.27.4467

Cited by 68 publications

(24 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is the electronic densities of states) is the electronic contribution, which can be calculated from band-structure calculations, and δ sf is the contribution of the spin fluctuations [6,23].…”

Section: Discussionmentioning

confidence: 99%

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

Section: Discussionmentioning

confidence: 99%

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

show abstract

“…1) that an anomaly in S would be a maximum at m c . 2] This implies that -TdB m /dT is positive for m <m c and negative for m> m c , so that its effect would be to create in Br(rn) a stronger plateau than in B m (m).…”

Section: The Correction T(db M /Dt)mentioning

confidence: 95%

“…The corrections Q\ g and () cap are important in order to get this behavior, but do not influence the results for m>0. 2 (i.e., smaller times). Figure 3 shows that the susceptibility decreases monotonously when m and BT increase.…”

Section: The Correction T(db M /Dt)mentioning

confidence: 98%

Measurement of the magnetization of liquidHe3up to 200 T

Wiegers¹,

Wolf²,

Puech³

1991

Phys. Rev. Lett.

View full text Add to dashboard Cite

We have measured the relaxation of energy and polarization m in transiently polarized liquid 3 He. From these measurements we deduce the value of the magnetic field necessary to stabilize m. This field is shown to be higher than the extrapolation of the low-field regime, and amounts to 200 T at m =0.6, r = 70mK, /> =26 bars.PACS numbers: 67.50.-b Liquid He has long been recognized as a model system of a strongly correlated Fermi liquid. Beyond the famous phenomenological Landau theory, several microscopic models aim to account for the physical properties of this system. Among them, the "nearly localized" model 1 and paramagnon theory, 2 respectively, ascribe the strong enhancements (compared to a free Fermi gas) of the specific heat and the magnetic susceptibility to the proximity of either a Mott transition or a ferromagnetic instability. Measuring the magnetic susceptibility x of liquid 3 He up to very high polarizations has been suggested as a crucial step in determining which approach is most suitable, 3 but only small polarizations m (m < 12%) can be reached in a static magnetic field ( < 30 T). Transient experiments are possible anyway, since the relaxation of the liquid polarization is a slow process (7*1 -10-1000 s). 3,4 Large polarizations can be obtained in the liquid by melting solid 3 He, previously polarized at low temperature (T-~5 mK) in a large magnetic field (^-10 T). T\ is then much longer than any other microscopic relaxation time of the system; this allows one to perform thermodynamic measurements as a function of the slowly varying magnetization. A number of experiments have been performed, using this method proposed by Castaing and Nozieres 3 (CN), resulting in contradictory conclusions about the magnetic behavior of the liquid. We stress that none of them allows direct investigation of x-Melting-pressure measurements 5,6 suggest a peak in x around m -20% (Ref. 7) (as expected from the "nearly localized model"), but in this case one deals with a mixture of liquid and solid, where a specific hypothesis must be made to relate the average polarization to that of the liquid. 8 Viscosity measurements 9^'10 would favor a decrease in x with w, consistent with the paramagnon model. 11 But there one measures a transport coefficient, which is related to x only through a specific hypothesis. The sound-velocity measurement 12 did not give conclusive information about x* 13 We report a direct investigation of the relationship between m and the magnetic field B m , with which m would be at equilibrium. This investigation is performed at sufficiently low temperature for the liquid to be degenerate (T < 0.1 K). It is carried out by measuring the relaxation of the polarization and the relaxational heating. Indeed, for each flipped spin an energy given by the difference between the chemical potentials of up and down spins is released as heat. This amounts 3 to 2jd n (B m -B a ), where B a is the applied field and fi n the magnetic moment of 3 He. Then, for n atoms heat is produced irreversibly at a rate giv...

show abstract

“…Because of our partial polarization, a direct comparison is possible only for the nearly ferromagnetic model, where only the spin fluctuations are taken into account [1]. Béal-Monod and Daniel [23] have computed the temperature and field dependence of the magnetization M within this model up to order B 3 . Inverting this relation for M M͑B, T ͒, and using Maxwell's relation ͑ ≠S ≠M ͒ T 2͑ ≠B ≠T ͒ M , we deduced the polarization dependence of specific heat up to order m 4 .…”

Section: (Received 24 March 2000)mentioning

confidence: 99%

Polarization Decreases the Specific Heat of LiquidH3e

Buu

Puech

2000

Phys. Rev. Lett.

View full text Add to dashboard Cite

We report on the first measurements of the polarization dependence of the specific heat of liquid 3He. Transient polarizations m of up to 70% were reached by using the rapid melting technique. The specific heat at 60-100 mK and 27 bars is found to decrease approximately as m(2), the reduction reaching at least 30% for m = 70%. These results contradict the nearly localized picture of 3He, and are in agreement with the idea that a large part of the specific heat is due to spin fluctuations.

show abstract

Field dependences of magnetization and specific-heat coefficient in a nearly magnetic system: LiquidHe3and strong Pauli paramagnets

Cited by 68 publications

References 13 publications

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points

Measurement of the magnetization of liquidHe3up to 200 T

Polarization Decreases the Specific Heat of LiquidH3e

Contact Info

Product

Resources

About

Field dependences of magnetization and specific-heat coefficient in a nearly magnetic system: LiquidHe3and strong Pauli paramagnets

Cited by 68 publications

References 13 publications

Photoinduced second harmonic generation of LaFe4Sb12 near spin fluctuated critical points

Photoinduced second harmonic generation of LaFe4Sb12 near spin fluctuated critical points

Measurement of the magnetization of liquidHe3up to 200 T

Polarization Decreases the Specific Heat of LiquidH3e

Contact Info

Product

Resources

About

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points

Photoinduced second harmonic generation of LaFe₄Sb₁₂near spin fluctuated critical points