Palladium paramagnetic susceptibility

Fig. 17. Activation energy for parahydrogen conversion on palladium-gold alloys. The broken line denotes the paramagnetic susceptibility in arbitrary units. [Couper, A., and Eley, D. D., Discusaions Faraday Soc. 8, 172 (1950).]...

Fig. X-2.—Curves showing the reciprocal of molar paramagnetic susceptibility of nickel, palladium, and platinum as a function of the absolute temperature.

There have been a number of studies on the particle size dependence of ferromagnetic behaviour, but fewer on paramagnetic. Small palladium particles have however been shown to have lower paramagnetic susceptibility than large particles. ... 

The disappearance of the paramagnetism of palladium-silver alloys (rich in Pd) when the ratio (H + Ag)/Pd = 0.6 (24) illustrates that the effect of both these alloying" elements in palladium is additive and each one contributes essentially in the same way to the change of magnetic susceptibility of palladium. 

Fig. 2. Temperature dependence of the magnetic susceptibility x (right scale) and of the field for Pd NMR at fixed Larmor frequency Bo (left scale) for palladium. Similar to Fig. la, the NMR field shift and the susceptibility are proportional. Both are (mainly) caused by the Pauli-type paramagnetism of the d-like conduction electrons. (The temperature dependence is not predicted by the simple free-electron description of the susceptibility in metals.) [Reproduced with permission from Seitchik et al. (16). Copyright 1964 American Physical Society.]...

All platinum metals are paramagnetic (x > 0). The magnetic susceptibilities of palladium and platinum decrease with increasing temperature, the magnetic susceptibilities of rhodium, iridium, ruthenium, and osmium increase with increasing temperature (Fig. 3.1-272 [1.218]). 

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