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Sereni, J. G. "Comparative study of magnetic phase diagrams of Ce compounds." Journal of the Physical Society of Japan 67, no. 5 (1998): 1767–1775. Abstract: Thermal properties of magnetically ordered Ce-lattice systems are compared in their crossover to the non-magnetic state, driven by alloying effects. The ordering temperature (T-ord=T-N or T-C) is found to go to zero continuously only in a few cases, while in others a discontinuity in its decrease is clearly observed. Coincidentally, the magnetic contribution to the specific heat (C-p), the entropy and the free energy variations with temperature mark an evident difference between those cases. Furthermore, the extension of the non-fermi-liquid (NFL) phase in terms of concentration variation correlates with differences observed in the respective ordered phase. A systematic transformation from a mean field like transition to a fluctuation dominated type is observed in C-p(T), as the system overcomes a characteristic crossover concentration. Such a concentration appears as a limit for the NFL behavior in the paramagnetic phase above T-ord. A possible origin of the mentioned differences are discussed in terms of some alternatives in the evolution of the magnetic moments and the strength of their interactions. http://fisica.cab.cnea.gov.ar/bt/refbase/show.php?record=87
Sereni, J. G. "Thermodynamical analysis of the magnetic phase diagrams of Ce systems." Journal of the Physical Society of Japan 70, no. 7 (2001): 2139–2150. Abstract: Three types of magnetic phase diagrams as a function of composition or pressure, f (z, p), are identified among Ce systems: I) with the ordering temperature T-ord --> 0 monotonously, followed by a narrow region where non-Fermi-liquid (NFL) behavior is observed; II) with T-ord vanishing at finite temperature, but followed by an extended NFL region, and III) where T-ord remains nearly constant. Among the analyzed systems intrinsic differences are found in the evolution of their respective properties, namely: in group-1 an increase of the density of excitations is observed below T-ord. In group-II the evanescense of T-ord(z, p) coincides with the extrapolation to zero of the magnetic free energy (DeltaG --> 0), and the existence of a reference function implying that T-K not equal f (z, p), whereas T-ord = f (z, p). Finally, group-III is also characterized by the evanescense of T-ord where DeltaG --> 0, but in this case T-ord not equal f (z, p) whereas T-K = f (z, p). The characteristics of each group are discussed and compared together with the different C-p(T)/T dependencies at T greater than or equal to T-ord and some related scalings, which allow to recognize a quasi-paramagnetic phase. http://fisica.cab.cnea.gov.ar/bt/refbase/show.php?record=77
Bauer, E., H. Kaldarar, A. Prokofiev, E. Royanian, A. Amato, J. G. Sereni, W. Bramer-Escamilla, and I. Bonalde. "Heavy Fermion Superconductivity and Antiferromagnetic Ordering in CePt3Si without Inversion Symmetry." Journal of the Physical Society of Japan 76, no. 5 (2007): 051009. Abstract: Heavy fermion superconductivity in absence of inversion symmetry of the crystal structure is basically controlled by a Rashba-like antisymmetric spin orbit coupling which splits the Fermi surface and removes the spin degeneracy of electrons. The Fermi surface splitting originates a mixing of spin-singlet and spin-triplet states in the superconducting condensate. Such constraints are responsible for various uncommon features of the superconducting ground state and are discussed here in view of CePt 3 Si, the first heavy fermion superconductor missing a centre of symmetry. We recall and discuss normal and superconducting properties of CePt 3 Si and relate them to recently developed phenomenological theories. http://fisica.cab.cnea.gov.ar/bt/refbase/show.php?record=687

Sereni, J. G. "Comparative study of magnetic phase diagrams of Ce compounds." Journal of the Physical Society of Japan 67, no. 5 (1998): 1767–1775.

Sereni, J. G. "Thermodynamical analysis of the magnetic phase diagrams of Ce systems." Journal of the Physical Society of Japan 70, no. 7 (2001): 2139–2150.

Bauer, E., H. Kaldarar, A. Prokofiev, E. Royanian, A. Amato, J. G. Sereni, W. Bramer-Escamilla, and I. Bonalde. "Heavy Fermion Superconductivity and Antiferromagnetic Ordering in CePt3Si without Inversion Symmetry." Journal of the Physical Society of Japan 76, no. 5 (2007): 051009.