Anomalous temperature dependence of the electrical resistivity in binary and pseudobinary alloys based on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Si

Nishino, Yoichi; Inoue, S; Asano, Shigeru; Kawamiya, Nobuo

doi:10.1103/physrevb.48.13607

Cited by 77 publications

(57 citation statements)

References 25 publications

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“…With an increase in Ni in (Fe1_ xNix)2P, we observe vanishing of spin band splitting and non-rigid behaving of valence bands near the Fermi level. Considering our electrical resistivity data of hexagonal systems as well as for instance Fe3_ x Vx Si Hensler system [10], some common features can be noticed such as a maximum on resistivity curve R(T) close to Tc. The DOS curves of Fe3 _ xVSi system is close to the half-metallic ferromagnets, which exhibit 100% polarization of electrons at EF (a gap for one spin direction).…”

Section: Defined As On(e)= N+(e) -N_(e) We Observe That Conduction Ementioning

confidence: 77%

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results

et al. 1997

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We present results of the electronic structure study for the solid solution (Fe1_xNix)2P (space group P62m). The samples were synthesized for x = 0.0 up to 0.15. From the electrical conductivity measurements on these materials, it was verified that resistivity increases with increasing temperature up to the Curie point Tc and changes the slope at Tc decreasing when temperature is raised above Tc. To get insight into the possible origin of such observations, we carried out the Korringa-Kohn-Rostoker-coherent potential approximation electronic structure calculations for (Fe1_ xNi x )2P in the range of concentration x = 0.0 up to 1.0. It was found that alloying with Ni in Fe2P causes vanishing of spin band splitting and non-rigid band behaving of electronic valence states near the Fermi level. The polarization factor for electrons at Es. changes in (Fe1-xNix)2P with increasing x, and interestingly, it reaches maximum at x = 0.1, closely to the concentration (x = 0.08), when the largest value of Tc and a kink in temperature dependent resistivity were detected.PACS numbers: 71.20. Lp, 75.50.Cc 1. Introduction The T2D hexagonal systems (space group P62m), where T represent 3d (Mn, Fe, Co, Ni) or 4d (Ru, Rh) transition metal elements, and D are metalloids (Si, P, As), exhibit complex behaviour of some measured quantities. The structural, magnetic and transport properties were investigated by various experimental techniques (neutron diffraction measurements, Mössbauer effect, specific heat, electrical resistivity, magnetization measurements) [1, 2], as well as by the

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Section: Defined As On(e)= N+(e) -N_(e) We Observe That Conduction Ementioning

confidence: 77%

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results

et al. 1997

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“…5. The straight line in the figure indicates the Wiedemann-Franz relation at 300 K. The electrical resistivity data have been reported for NiAl, [56][57][58][59][60] CoAl, 57,59,61) FeAl, 56) NiGa, 59) CoGa, 59) NiTi, 26,62,63) CoTi 62,63) and FeTi [62][63][64] with the B2 structure, Ni 3 Al, 27,65,66) 85,86) with the D0 3 structure. The thermal conductivity data are provided by our group.…”

Section: Identification Of Heat Carriermentioning

confidence: 93%

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

et al. 2002

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Thermal conductivity is one of the key parameters required for high-temperature structural applications of metallic materials. In this overview, the thermal conductivity of intermetallic compounds are extensively described based mainly on our past works, since there had been less works in this research field. Emphasis is placed on the B2 and the L1 2 compounds with metallic bonding such as NiAl, Ni 3 Al, etc., which have been attracting attention for engineering applications at higher temperatures. The thermal conductivity data have been accumulated for the intermetallic compounds, and the phenomenological aspects are reviewed in detail as a function of alloy composition, constituent and temperature. The Wiedemann-Franz law is applicable to the intermetallic compounds, indicating that the carrier of thermal conduction is an electron rather than a phonon. The thermal conductivity of an intermetallic compound with the ordered crystal structure is characterized as an enhancement due to ordering with reference to the basic contribution of solid solution with the disordered crystal structure. It is demonstrated that the thermal conductivity of intermetallic compounds is reduced by the addition of a third element, and this subject is also covered.

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“…It is interesting to notice that a negative TCR is prevalent in Fe 4Ϫx Si x for 0рxр1, 24 26 reported that Fe 2 VAl in a simple cubic lattice also shows a negative TCR between 4.2 and 300 K. With only FeVFeAl in a semimetallic ground state, the negative TCR in these alloys may have little to do with semimetallicity. Mooij 27 studied the transport properties of a number of transition-metal alloys finding that high resistivity with concomitant negative TCR was a ''universal'' property of many.…”

Section: Resistivitymentioning

confidence: 99%

Physical properties of Heusler-likeFe2VAl

et al. 2001

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A comprehensive characterization of the compound Fe 2 VAl was carried out. Samples grown by arc melting or the Bridgman method have Al and Fe deficiencies of up to 5 at. %. Czochralski-grown samples were Fe rich and Al deficient. X-ray diffraction implies appreciable antisite disorder in all of our samples. Fourier-transform infrared (FTIR) spectroscopy measurements showed that the carrier density and scattering time had little sample-to-sample variation or temperature dependence for near-stoichiometric samples. FTIR and dc resistivity suggest that the transport properties of Fe 2 VAl are influenced by both localized and delocalized carriers, with the former primarily responsible for the negative temperature coefficient of resistivity. Magnetization measurements reveal that near-stoichiometric samples have superparamagnetic clusters with at least two sizes of moments. We conclude that in Fe 2 VAl, antisite disorder causes significant modification to the semimetallic band structure proposed theoretically. With antisite disorder considered, we are now able to explain most of the physical properties of Fe 2 VAl. None of our data suggest heavy-fermion behavior in our samples. A comprehensive characterization of the compound Fe 2 VAl was carried out. Samples grown by arc melting or the Bridgman method have Al and Fe deficiencies of up to 5 at. %. Czochralski-grown samples were Fe rich and Al deficient. X-ray diffraction implies appreciable antisite disorder in all of our samples. Fourier-transform infrared ͑FTIR͒ spectroscopy measurements showed that the carrier density and scattering time had little sample-to-sample variation or temperature dependence for near-stoichiometric samples. FTIR and dc resistivity suggest that the transport properties of Fe 2 VAl are influenced by both localized and delocalized carriers, with the former primarily responsible for the negative temperature coefficient of resistivity. Magnetization measurements reveal that near-stoichiometric samples have superparamagnetic clusters with at least two sizes of moments. We conclude that in Fe 2 VAl, antisite disorder causes significant modification to the semimetallic band structure proposed theoretically. With antisite disorder considered, we are now able to explain most of the physical properties of Fe 2 VAl. None of our data suggest heavy-fermion behavior in our samples. Keywords Physics and Astronomy

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Anomalous temperature dependence of the electrical resistivity in binary and pseudobinary alloys based onFe3Si

Cited by 77 publications

References 25 publications

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

Physical properties of Heusler-likeFe2VAl

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Anomalous temperature dependence of the electrical resistivity in binary and pseudobinary alloys based onFe3Si

Cited by 77 publications

References 25 publications

Magnetic and Transport Properties of (Fe1-xNix)2P in View of KKR-CPA Results

Magnetic and Transport Properties of (Fe1-xNix)2P in View of KKR-CPA Results

Thermal Conductivity of Intermetallic Compounds with Metallic Bonding

Physical properties of Heusler-likeFe2VAl

Contact Info

Product

Resources

About

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results

Magnetic and Transport Properties of (Fe_1-xNi_x)₂P in View of KKR-CPA Results