Pressure dependence of the re-entrant superconducting phase boundaries of (LaCe)Al2 and La0.8Th0.2Ce alloys

P. H. Ansari; J. B. Bulman; J. G. Huber; L. E. DeLong; M. B. Maple

doi:10.1016/0378-4363(81)90937-2

Pressure dependence of the re-entrant superconducting phase boundaries of (LaCe)Al₂ and La_0.8Th_0.2Ce alloys

P. H. Ansari, J. B. Bulman, J. G. Huber, L. E. DeLong, M. B. Maple

Producción científica: Article › revisión exhaustiva

6 Citas (Scopus)

Resumen

Measurements of the pressure dependence of the superconducting critical temperature (T_c) are reported for the re-entrant superconducting Kondo systems (LaCe)Al₂ and La_0.8Th_0.2Ce.

Idioma original	English
Páginas (desde-hasta)	1275-1276
Número de páginas	2
Publicación	Physica B+C
Volumen	108
N.º	1-3
DOI	https://doi.org/10.1016/0378-4363(81)90937-2
Estado	Published - 1981

Nota bibliográfica

Funding Information:
or alloying of the La matrix with Th (6, 12) produces both superconducting and normal state data that are consistent with an increase of TE/Tco up to the pressure or Th concentration at which the Kondo or exchange model no longer provides an appropriate description. Thus, it would seem logical that the effect of applying an external pressure and alloying with Th would be additive, so that applying pressure to the La0, 8Th0, 2Ce system would result in an increase of TK/Tco. However, the data shown in Fig. 2 imply either that T K decreases with applied pressure, or that another regime of reentrant superconductive behavior be come s accessible at higher values of TI4/Tco. A second regime of re-entrant superconductive behav ior at higher pressure has, in fact, been predicted by Wiecko and Lopez (13) for systems in which Ce impurities undergo a pressure-induced demagnetization. Finally, the possible role of Ce-Ce interaction effects should not be overlooked. For example, Liu and Ruvalds (14) have recently suggested that RKt~Y coupling that favors ferromagnetic alignment of impurity magnetic moments can produce re-entrant superconductive behavior, Research supported by the National Science Foundation (PHA, JBB, and JGH) and the U.S. Department of Energy under Contract No. DE-AT03-7 6ER7 0227 (MBM).

Financiación

or alloying of the La matrix with Th (6, 12) produces both superconducting and normal state data that are consistent with an increase of TE/Tco up to the pressure or Th concentration at which the Kondo or exchange model no longer provides an appropriate description. Thus, it would seem logical that the effect of applying an external pressure and alloying with Th would be additive, so that applying pressure to the La0, 8Th0, 2Ce system would result in an increase of TK/Tco. However, the data shown in Fig. 2 imply either that T K decreases with applied pressure, or that another regime of reentrant superconductive behavior be come s accessible at higher values of TI4/Tco. A second regime of re-entrant superconductive behav ior at higher pressure has, in fact, been predicted by Wiecko and Lopez (13) for systems in which Ce impurities undergo a pressure-induced demagnetization. Finally, the possible role of Ce-Ce interaction effects should not be overlooked. For example, Liu and Ruvalds (14) have recently suggested that RKt~Y coupling that favors ferromagnetic alignment of impurity magnetic moments can produce re-entrant superconductive behavior, Research supported by the National Science Foundation (PHA, JBB, and JGH) and the U.S. Department of Energy under Contract No. DE-AT03-7 6ER7 0227 (MBM).

Financiadores	Número del financiador
National Science Foundation (NSF)
Michigan State University-U.S. Department of Energy (MSU-DOE) Plant Research Laboratory	DE-AT03-7 6ER7 0227
Jewish General Hospital

ASJC Scopus subject areas

General Engineering

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10.1016/0378-4363(81)90937-2

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title = "Pressure dependence of the re-entrant superconducting phase boundaries of (LaCe)Al2 and La0.8Th0.2Ce alloys",

abstract = "Measurements of the pressure dependence of the superconducting critical temperature (Tc) are reported for the re-entrant superconducting Kondo systems (LaCe)Al2 and La0.8Th0.2Ce.",

author = "Ansari, \{P. H.\} and Bulman, \{J. B.\} and Huber, \{J. G.\} and DeLong, \{L. E.\} and Maple, \{M. B.\}",

note = "Funding Information: or alloying of the La matrix with Th (6, 12) produces both superconducting and normal state data that are consistent with an increase of TE/Tco up to the pressure or Th concentration at which the Kondo or exchange model no longer provides an appropriate description. Thus, it would seem logical that the effect of applying an external pressure and alloying with Th would be additive, so that applying pressure to the La0, 8Th0, 2Ce system would result in an increase of TK/Tco. However, the data shown in Fig. 2 imply either that T K decreases with applied pressure, or that another regime of reentrant superconductive behavior be come s accessible at higher values of TI4/Tco. A second regime of re-entrant superconductive behav ior at higher pressure has, in fact, been predicted by Wiecko and Lopez (13) for systems in which Ce impurities undergo a pressure-induced demagnetization. Finally, the possible role of Ce-Ce interaction effects should not be overlooked. For example, Liu and Ruvalds (14) have recently suggested that RKt\textasciitilde{}Y coupling that favors ferromagnetic alignment of impurity magnetic moments can produce re-entrant superconductive behavior, Research supported by the National Science Foundation (PHA, JBB, and JGH) and the U.S. Department of Energy under Contract No. DE-AT03-7 6ER7 0227 (MBM).",

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AU - Bulman, J. B.

AU - Huber, J. G.

AU - DeLong, L. E.

AU - Maple, M. B.

N1 - Funding Information: or alloying of the La matrix with Th (6, 12) produces both superconducting and normal state data that are consistent with an increase of TE/Tco up to the pressure or Th concentration at which the Kondo or exchange model no longer provides an appropriate description. Thus, it would seem logical that the effect of applying an external pressure and alloying with Th would be additive, so that applying pressure to the La0, 8Th0, 2Ce system would result in an increase of TK/Tco. However, the data shown in Fig. 2 imply either that T K decreases with applied pressure, or that another regime of reentrant superconductive behavior be come s accessible at higher values of TI4/Tco. A second regime of re-entrant superconductive behav ior at higher pressure has, in fact, been predicted by Wiecko and Lopez (13) for systems in which Ce impurities undergo a pressure-induced demagnetization. Finally, the possible role of Ce-Ce interaction effects should not be overlooked. For example, Liu and Ruvalds (14) have recently suggested that RKt~Y coupling that favors ferromagnetic alignment of impurity magnetic moments can produce re-entrant superconductive behavior, Research supported by the National Science Foundation (PHA, JBB, and JGH) and the U.S. Department of Energy under Contract No. DE-AT03-7 6ER7 0227 (MBM).

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