The magnetic susceptibility of some Pd-Cr and Pt-Cr alloys

Dam, J.E. Van; Gubbens, P.C.M.; Berg, Gérard J. van den

doi:10.1016/0031-8914(73)90361-3

Cited by 16 publications

(4 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The magnetic susceptibility χ(T ) of the compact "µPt2" shown in fig. 2b exhibits in good approximation the behaviour of bulk platinum known from the literature [13]: At T 100 K the constant Pauli-Stoner susceptibility χ 0 is superimposed by a temperaturedependent contribution due to paramagnetic impurities. Fitting the low-temperature part of χ(T ) to the Brillouin function enables thus to determine χ 0 as well as the concentration x and the effective magnetic moment of these impurities which is in the range 5-8 µ B in our samples.…”

supporting

confidence: 56%

T _c -enhancement in superconducting granular platinum

Strobel¹,

König²,

Herrmannsdörfer³

et al. 2002

Europhys. Lett.

View full text Add to dashboard Cite

We have observed superconductivity in platinum powder compacts with grain sizes in the submicrometer range at transition temperatures and critical magnetic fields as high as 20 mK and 18 mT. These values are more than one order of magnitude larger compared to our previous results for samples with larger (micrometer) grain size. For a better understanding of the superconducting properties of the granular platinum samples, we have also investigated various properties in the normal state. The submicrometer samples exhibit strong lattice strain and significantly smaller Debye temperatures compared to bulk platinum. Moreover, the ferromagnetic spin fluctuations of the conduction electrons are partially quenched in these compacts. On the basis of these results, we discuss the origin of superconductivity in granular platinum.

show abstract

supporting

confidence: 56%

T _c -enhancement in superconducting granular platinum

Strobel¹,

König²,

Herrmannsdörfer³

et al. 2002

Europhys. Lett.

View full text Add to dashboard Cite

show abstract

“…The experimental values were taken from [21,22] and [23]. All results presented in this section are based on FLAPW calculations.…”

Section: Resultsmentioning

confidence: 99%

“…Altogether we could show that the temperature dependence of the susceptibility is a very intricate interplay of one-particle and many-body effects. The many-body excitations are strongly influenced by single-particle effects, as expressed by equation (23).…”

Section: Discussionmentioning

confidence: 99%

The Onsager reaction field concept applied to the temperature dependent magnetic susceptibility of the enhanced paramagnets Pd and Pt

Zellermann¹,

Paintner

Voitländer

2004

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

In this paper three different ways to calculate the temperature dependent susceptibility of the enhanced paramagnets Pd and Pt are presented and compared. Special attention is paid to the relative importance of one-particle and many-particle excitations. One of these methods has never been applied before to real itinerant systems. It is based upon Onsager's reaction field model, which seems to be a feasible and rigorous way to go beyond the mean field approximation, and it allows one to make quantitative statements. The backbone of this theory is the calculation of a temperature dependent Hubbard U due to thermal many-body excitations. In contrast to an earlier calculation we found a significant temperature dependence of U for Pd. The theoretical results are in fairly reasonable agreement with the experimental findings for both Pd and Pt.

show abstract

“…Les interactions entre ces moments geants favorisent finalement un ordre ferromagnetique. L'impurete Cr montre des proprietes a premiere vue diff6rentes qu'on peut resumer en deux points : apparition dans la resistivite d'une forte anomalie [2, 3] Kondo avec une temperature de Kondo superieure a 100 K (remarquons toutefois qu'une anomalie similaire mais de signe oppose est vue dans le syst~me Pd-Co [4, 5]) et absence de tout ordre magnetique [6,7,8] pour des concentrations en Cr inferieures a 7 %.…”

unclassified

Effet Kondo et ordre magnétique d'alliages Pd-Cr-Hx

1976

View full text Add to dashboard Cite

Nous avons mesuré la résistivité électrique d'alliages Pd1- yCryHx à des températures supérieures à 1,5 K et pour des concentrations y < 4 % at. et 0,5 < x < 0,8. Nous observons des anomalies liées à l'effet Kondo et à l'ordre magnétique. La température de Kondo de l'impureté Cr est plus petite dans Pd-Hx que dans le palladium pur. Les effets liés à l'ordre magnétique se produisent dès que y > 0,5 % at., alors qu'il en faut 7 % dans le Pd pur. Les températures d'apparition de ces effets croissent avec y mais aussi avec x

show abstract

The magnetic susceptibility of some Pd-Cr and Pt-Cr alloys

Cited by 16 publications

References 34 publications

T _c -enhancement in superconducting granular platinum

T _c -enhancement in superconducting granular platinum

The Onsager reaction field concept applied to the temperature dependent magnetic susceptibility of the enhanced paramagnets Pd and Pt

Effet Kondo et ordre magnétique d'alliages Pd-Cr-Hx

Contact Info

Product

Resources

About

The magnetic susceptibility of some Pd-Cr and Pt-Cr alloys

Cited by 16 publications

References 34 publications

T c -enhancement in superconducting granular platinum

T c -enhancement in superconducting granular platinum

The Onsager reaction field concept applied to the temperature dependent magnetic susceptibility of the enhanced paramagnets Pd and Pt

Effet Kondo et ordre magnétique d'alliages Pd-Cr-Hx

Contact Info

Product

Resources

About

T _c -enhancement in superconducting granular platinum

T _c -enhancement in superconducting granular platinum