Spin-Disorder Scattering in Iron- and Nickel-Base Alloys

Schwerer, F. C.; Cuddy, L. J.

doi:10.1103/physrevb.2.1575

Cited by 41 publications

(22 citation statements)

References 25 publications

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“…6, therefore dR/dT shows a peak similar to the specific heat. The peak of dR/dT has been experimentally observed in many materials, in particular in MnSi [3,4] among others [2].…”

Section: Results On Antiferromagnetic Thin Filmsmentioning

confidence: 99%

“…However at higher T the spin-wave theory is not valid, such a calculation of the resistivity is not possible, in particular in the critical region around the Curie temperature T c in simple ferromagnets, let alone other complicated magnetic orderings. Experiments on various magnetic materials have found in particular an anomalous behavior of the resistivity at the critical temperature where the system undergoes the ferromagnetic-paramagnetic phase transition [2][3][4][5][6]. Very recent experiments such as those performed on ferromagnetic SrRuO 3 thin films [9], superconducting BaFe 2 As 2 single crystals [10], La 1−x Sr x MnO 3 [11], Mn 1−x Cr x Te [12] and other compounds [13][14][15][16] show different forms of anomaly of the magnetic resistivity at the transition temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Experiments have shown that the resistivity indeed depends on the itinerant spin orientation and the lattice spin ordering [1][2][3][4][5][6]. At low temperature (T ), the main magnetic scattering is due to spin-wave excitations [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Monte Carlo study of the spin transport in magnetic materials

Magnin¹,

Akabli²,

Diep³

et al. 2010

Computational Materials Science

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The resistivity in magnetic materials has been theoretically shown to depend on the spin-spin correlation function which in turn depends on the magnetic-field, the density of conduction electron, the magnetic ordering stability, etc. However, these theories involved a lot of approximations, so their validity remained to be confirmed. The purpose of this work is to show by newly improved extensive Monte Carlo (MC) simulation the resistivity of the spin resistivity from low-T ordered phase to high-T paramagnetic phase in ferromagnetic and antiferromagnetic films. We take into account the interaction between the itinerant spins and the localized lattice spins as well as the interaction between itinerant spins themselves. We show that in ferromagnets the resistivity shows a sharp peak at the magnetic phase transition in agreement with previous theories in spite of their numerous approximations. Resistivity in antiferromagnets on the other hand shows no peak for the SC, BCC and diamond lattices. Discussion on the origin of these resistivity behaviors is given.

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“…6, therefore dR/dT shows a peak similar to the specific heat. The peak of dR/dT has been experimentally observed in many materials, in particular in MnSi [3,4] among others [2].…”

Section: Results On Antiferromagnetic Thin Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Monte Carlo study of the spin transport in magnetic materials

Magnin¹,

Akabli²,

Diep³

et al. 2010

Computational Materials Science

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“…Figure 1 gives the electrical resistivity as a function of temperature for the is also plotted, together with the magnetic term os(T). Following Schwerer et al [20] and Awad [10], this spindisorder resistivity term was fitted by the last square method to an exponential' function of the form:…”

Section: Q(t) = Qo+qvh(t)+q~(t)mentioning

confidence: 99%

Critical behaviour of thermal resistivity of Ni

Okaz

El-Osairy

Mahmoud

1989

Journal of Thermal Analysis

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Accurate data are presented on the behaviour of the thermal conductivity K as a function of temperature for a pure Ni sample near its Curie point. Previous results on the electrical resistivity (Q, dQ/dT) are used to explain the temperature-dependence of K(T). The results are analysed in terms of electron-phonon and s-d exchange interactions. The critical behaviour of the thermal resistivity W(= K-~) has also been investigated.Study of the transport properties of magnetic phase transitions provides a sensitive and often rather simple means of investigation details of the microscopic interactions. The electrical resistivity Q in particular has received a good deal of attention [1][2][3][4][5][6][7]. The scanty experimental information available on the thermal conductivity K of magnetic materials and on the complex behaviour which occurs in the transition region earlier precluded any discussion on such matters as the values of the critical exponents. Accordingly, only general features were considered [8][9][10][11][12]. The critical exponents are of interest because many different kinds of physical systems behave in a similar way near the critical point To. This work reports for the first time the critical exponents of the thermal resistivity of pure Ni both below and above To. The universality concept [4,5,13] is also tested.In ferromagnetic metals and alloys, the most characteristic interaction is the s-d interaction, i.e. the spin exchange interaction between the conduction (s) and unfilled shell (d) electrons. According to Kasuya [1], this exchange interaction depends on the relative orientation of the spins of both electrons. Therefore, at T= 0all the spins of d-electrons being in order, there is no electrical resistance, while at a finite temperature this order is disturbed and thus a resistance appears and increases with temperature. Above To, the directions of the d-electron spins become perfectly random, and the electrical resistance remains constant. The resistivity caused by such a process is called the spin-fluctuation [3] or spin-disorder contribution [10].

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“…Experiments have been performed in many mag- gives rise to a peak of the dierential resistivity dρ/ dT [8,9].…”

Section: Introductionmentioning

confidence: 99%

Spin Resistivity in Magnetic Materials

2012

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We show in this paper recent results on the spin resistivity in magnetically ordered materials obtained by Monte Carlo simulations. We discuss its behavior as a function of temperature in various types of crystal: ferromagnetic, antiferromagnetic, and frustrated spin systems. In the model used for simulations, we take into account the interaction between itinerant spins and that between lattice spins and itinerant spins. We also include a chemical potential term, as well as an electric eld. We study in particular the behavior of the spin resistivity at and near the magnetic phase transition where the eect of the magnetic ordering is strongest. In ferromagnetic crystals, the spin resistivity shows a sharp peak very similar to the magnetic susceptibility. This can be understood if one relates the spin resistivity to the spinspin correlation as suggested in a number of theories. The dependence of the shape of the peak on physical parameters such as carrier concentration, magnetic eld strength, relaxation time etc. is discussed. In antiferromagnets, the peak is not so pronounced and in some cases it is absent. Its direct relationship to the spinspin correlation is not obvious. As for frustrated spin systems with strong rst-order transition, the spin resistivity shows a discontinuity at the phase transition. To show the eciency of the simulation method, we compare our results with recent experimental data performed on semiconducting MnTe of NiAs structure. We observe a very good agreement with experiments on the spin resistivity in the whole range of temperature.

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Spin-Disorder Scattering in Iron- and Nickel-Base Alloys

Cited by 41 publications

References 25 publications

Monte Carlo study of the spin transport in magnetic materials

Monte Carlo study of the spin transport in magnetic materials

Critical behaviour of thermal resistivity of Ni

Spin Resistivity in Magnetic Materials

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