Showing papers by "M. B. Maple published in 1972"
TL;DR: In this paper, the reentrant superconducting normal phase boundary of the ( La, Ce)Al2 system is reported, and the pair breaking parameter deduced from the data increases with decreasing temperature as (-ln T) between 0.1 and 3.30°K.
108 citations
TL;DR: In this paper, specific heat measurements between 0.5 and 4.2°K on the system ( La, Ce) Al 2 in the normal and superconducting states are reported.
36 citations
TL;DR: The low temperature specific heat of the weakly magnetic system Th U has been measured in both the normal and superconducting states as mentioned in this paper, and impurities are found to enhanve the normal state electronic specific heat coefficient γ at an unusually large rate of 4.85 ± 0.50 mJ/mole °K2 at.
34 citations
TL;DR: In this article, the superconducting transition temperature of thorium metal to 160 kbar was investigated and the pressure dependence of the transition temperature was shown to be independent of the temperature.
18 citations
TL;DR: The susceptibility of TmTe increases continuously between 18 and 29 kbar at room temperature, while at helium temperature it increases between 29 and 39 kbar and flattens out above, indicating the existence of three separate electronic phases.
Abstract: The susceptibility of TmTe increases continuously between 18 and 29 kbar at room temperature, while at helium temperature it increases between 29 and 39 kbar and flattens out above, indicating the existence of three separate electronic phases. The increase of the magnetization is unhysteretic and smaller than expected for a full transformation from Tm2+ to Tm3+ at all temperatures and pressures. The low temperature magnetization curves in the high pressure phases are very non‐linear.
7 citations
01 Jan 1972
TL;DR: In this article, a review of the superconductivity in dilute alloy systems which exhibit localized spin fluctuations associated with resonant impurity states is presented, and it is shown that when the localized spin fluctuation temperature is much larger than superconducting temperatures, the transition temperature falls off rapidly with impurity concentration following a modified exponential, and the thermodynamic properties obey the BCS law of corresponding states.
Abstract: This paper discusses spin excitation effects in superconductors with an emphasis on experiment First, a review is presented of the superconductivity in dilute alloy systems which exhibit localized spin fluctuations associated with resonant impurity states It is shown that when the localized spin fluctuation temperature is much larger than superconducting temperatures; (1) the transition temperature falls off rapidly with impurity concentration following a modified exponential, and (2) the thermodynamic properties (eg, the specific heat jump at the transition and the critical field) obey the BCS law of corresponding states A comparison is made to a recent theory by Kaiser of superconductivity in the presence of nonmagnetic resonant impurity states Next, experiments on La and La intermetallic compounds with Ce impurities which simultaneously exhibit superconductivity and the Kondo effect are reviewed Finally, pressure‐induced magnetic‐nonmagnetic transitions of Ce impurities in superconductors are discussed and compared with certain theoretical models
7 citations
TL;DR: In this paper, it was shown that the application of pressure may raise the yet unobserved third T c to an experimentally accessible temperature, where T K is the Kando temperature and T c 0 is the T c of the matrix.
3 citations