Theory of Dilute Magnetic Alloys

Fischer, K. H.

doi:10.1002/pssb.2220460102

Cited by 52 publications

(8 citation statements)

References 96 publications

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“…A formula for the Kondo anomaly is given only for a degenerate ground state [e.g., (2.64) in Ref. 26]. In order to apply this formula for calculating S~ we have to take into account the thermal population numbers of the excited CF multiplets F5 and/or F4.…”

Section: Thermopowermentioning

confidence: 99%

Transport properties of (La, Pr)Sn3 alloys at low temperatures

Sütsch

Umlauf

1981

J Low Temp Phys

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We report on measurements concerning the transport properties of polycrystalline (Lal-xPrx)Sn3 samples with impurity concentrations O. 07 <-x <-0.2 in the temperature range 0.3 <-T<_ 12 K. The experimental results of the electrical resistivity, the thermopower, and the thermal conductivity show pronounced anomalies which are referred to crystal-field effects and a Kondo effect of excited levels. A quantitative comparison with existing theories confirms the importance of the aspherical Coulomb scattering in addition to the isotropic spin-exchange scattering of the conduction electrons by the magnetic ions. Taking into account the Kondo effect in a phenomenological ansatz, we are able to fit the magnetic part of the resistivity. Furthermore, we present the first experimental proof of the theoretically predicted influence of crystal-field split impurities on the thermal conductivity in dilute magnetic alloys. The thermopower is qualitatively discussed by a model including both the effect from inelastic scattering on the crystal-field levels and the Kondo effect. Finally the temperature dependence of the Lorenz number is compared with a calculation in the framework of crystal-field theory.

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Section: Thermopowermentioning

confidence: 99%

Transport properties of (La, Pr)Sn3 alloys at low temperatures

Sütsch

Umlauf

1981

J Low Temp Phys

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“…where z is the number of conduction electrons per atom, k, is [50]. The latter condition is evidently not met in the scattering with multiplicity excitation which is inelastic.…”

Section: Effect Of Ion Multiplicity Eicitations On Electric Resistivimentioning

confidence: 98%

Multiplicity and pseudomultiplicity of electron‐ion systems (I)

Vonsovskii

Svirskii

1976

Physica Status Solidi (b)

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Contents 1 . Introduction 2. Effect of ion multiplicity on electron exchange interactions i n crgstals 2.1 Generalized s-d(f) exchange interaction Hamiltonian allowing for exci-2.2 Generalized s-f exchange interaction Hamiltonian 2.3 Generalized direct exchange interaction Hamiltonian. Multiplicity waves 2.4 Generalized indirect exchange interaction Hamiltonian 2.5 Effect of ion multiplicity excitations on electric resistivity of metals 2.6 Effect of multiplicity excitations on the critical temperature of supercon-tations of spin multiplicity of d shells ductors 3. Spin s y s t e m multiplicity of the crgstal as a whole 3.1 Multiplicity indeterminancy of antiferromagnets 3.2 Multiplicity indeterminancy in the case of weak ferromagnetism 3.3 Multiplicity indeterminancy of helical magnetic structures References (Part I ) the establishment of the chemical valency of atoms [5], in t,he phenomenon of sensitized phosphorescence [6], in the photosynthesis of green plants 171, in the occurrence of stimulated radiation [8], in the resonance spin orientation in cosmic space [9], in the formation of Cooper pairs of superconductors [lo], and many others.Thus, multiplicity excitations are important not only for physical, but also for astrophysical, chemical, and biological phenomena.The quantum system of a gaseous or a condensed phase may deal both with mulbiplicity excitations of separate atomic particles, for example, magnetic ions, and the entire body (for example, of a crystal) as a whole. For instance, in the quantum theory of ferromagnetism the collective magnetic excitations, viz. x = 2 s + 1 , x = 2 J + l .

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“…The fact that Equation 13 diverges at low temperatures is not of primary importance to this work. For a discussion of the techniques employed to remove this troublesome divergence, the reader is referred to the literature (5)(6)(7)(16)(17)(18)(19)(20)(21)(22)(23).…”

Section: Basic Theorymentioning

confidence: 99%

Resistivity and magnetoresistance of dilute solutions of Cr in Cu-Ni alloys

Eagen

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Theory of Dilute Magnetic Alloys

Abstract: [Russian Text Ignored].

Cited by 52 publications

References 96 publications

Transport properties of (La, Pr)Sn3 alloys at low temperatures

Transport properties of (La, Pr)Sn3 alloys at low temperatures

Multiplicity and pseudomultiplicity of electron‐ion systems (I)

Resistivity and magnetoresistance of dilute solutions of Cr in Cu-Ni alloys

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