Conduction electron g-factor measurements in Au using the de Haas-van Alphen effect

Crabtree, G. W.; Windmiller, L. R.; Ketterson, J. B.

doi:10.1007/bf00120873

Cited by 28 publications

(2 citation statements)

References 26 publications

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“…24 The most important conclusion of Fenton's calculation is that for both the large-U (Kondo) and small-U limits of the Anderson model, Re Z,,(0) = A~ = -89 )K,A + C V (13) follows as an exact result for all temperatures and magnetic fields and in the presence of normal potential scattering (represented by V) from the magnetic impurity. In this equation c is the impurity (and local moment) concentration and the notation (S~)K,A refers to the impurity spin expectation value in the appropriate Kondo or Anderson limit.…”

Section: Theory: Dhva Effect In Dilute Alloys Containing Magnetic Impmentioning

confidence: 99%

Electronic properties from analysis of the harmonic content of the de Haas-van Alphen effect: Application to dilute magnetic alloys

1978

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A new technique, third harmonic de Haas-van Alphen (dHvA) wave shape analysis, is described for measurement of the spin-dependent interactions between conduction electrons and local moments in dilute alloys. We derive expressions for the harmonic content of the dHvA effect in a general case, including simultaneous contributions due to (1) magnetic interaction (MI or Shoenberg effect), (2) the spin-dependent scattering (SDS) of conduction electrons, and (3) exchange energy shifts in their Landau levels due to local moments, in addition to the usual Lifshitz-Kosevich harmonic content. The effects of MI and SDS mix nonlinearly in determining the observable amplitude and phase of each resultant dHvA harmonic. One important consequence of this mixing is that the observation of a spin splitting zero of the dHvA amplitude is not indicative of equal scattering rates for spin-up and spin-down electrons, in the presence of ML These techniques are then illustrated by applying them to studies of the dilute alloy systems Au(Fe ) and Au (Co), both of which are found to exhibit local magnetic moments, though apparently of quite different origin. For Au(Fe) the exchange energy shift (exchange field) and the spin-dependent scattering rates were determined as functions of (H,T). A 3:1 anisotropy of spin-up and spin-down electron scattering rates was observed for the (111) neck orbit. For Au( Co ) we report the first dHvA observations of interaction effects between impurities, via measurements of the spin-dependent scattering of conduction electrons by magnetic pairs of Co impurities. We conclude that the dHvA effect appears to be a sensitive probe for determining impurity spin behavior in a magnetic field, and for measuring cyclotron orbitally averaged values of the exchange constant Jo,bit in very dilute local moment systems. Similarly, the ability to resolve spin-dependent information allows the onset of solute interactions leading to magnetism to be observed at very low solute concentrations.Finally, the possibility of applying these same third harmonic wave shape analysis procedures for the measurement of conduction electron orbital gfactors in metals is briefly discussed, and one example of such a measurement for a Au(Ag) dilute alloy, is given

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Section: Theory: Dhva Effect In Dilute Alloys Containing Magnetic Impmentioning

confidence: 99%

Electronic properties from analysis of the harmonic content of the de Haas-van Alphen effect: Application to dilute magnetic alloys

1978

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“…When considering harmonics of the dHvA signals the harmonic number comes in as a factor in the cosine argument [3]. That means that if the fundamental and the second harmonic are detected simultaneously the variations o f R can be extracted for any field orientation [6,7].…”

Section: Introductionmentioning

confidence: 99%

The Anisotropy of the Conduction Electron g - Factor in Platinum

et al. 1982

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The Zeeman splitting of the conduction electrons has been investigated by means of the de Haas-van Alphen effect. Utilizing a magnetic field of 14 T made it possible to study the amplitude variation of the second harmonic of the de Haas-van Alphen signal for large portions of the Fermi surface. Several spin-splitting zeros of the second harmonic were located.The Zeeman splitting of the α-orbit is found to follow the effective cyclotron mass anisotropy and thus the g-factor is isotropic. On the contrary substantial anisotropy is found on the closed Γ6 sheet for cyclotron orbits in the vicinity of the [100]-axis. The Zeeman splitting is observed to change as much as one half Landau level spacing when the field direction is changed 2°.

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The conduction electron g‐factor on the fermi surface of copper

Franzosi

1977

Physica Status Solidi (b)

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Conduction electron g-factor measurements in Au using the de Haas-van Alphen effect

Cited by 28 publications

References 26 publications

Electronic properties from analysis of the harmonic content of the de Haas-van Alphen effect: Application to dilute magnetic alloys

Electronic properties from analysis of the harmonic content of the de Haas-van Alphen effect: Application to dilute magnetic alloys

The Anisotropy of the Conduction Electron g - Factor in Platinum

The conduction electron g‐factor on the fermi surface of copper

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