Magnetoresistance in Y(Ni1−xCox)5 around the critical concentration for the onset of ferromagnetism

Gratz, E.; Lindbaum, A.; Markosyan, A. S.; Milnera, M.

doi:10.1016/s0304-8853(97)00265-5

Cited by 4 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Very recently, a large negative magnetoresistance has been observed at 4.2 K for Y(Co 1−x Ni x ) 5 near x = 0.65 [17]. This observed result will be caused by the MT of the 3g-site atom by the magnetic field.…”

Section: Conclusion and Discussionmentioning

confidence: 91%

“…Thus the compound will show a large residual resistance just above the critical concentration, because of the coexistence of the magnetic and nonmagnetic atoms at the 3g site when there is no magnetic field. In fact, an extremely large resistivity is observed when there is no magnetic field for the samples with high quality [17].…”

Section: Conclusion and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Itinerant-electron metamagnetism of

Yamada

Terao

Ishikawa

et al. 1999

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Electronic structures of the pseudo-binary compound with the -type hexagonal structure are calculated in the self-consistent linear muffin-tin orbital method within the atomic sphere approximation, by taking into account the preferential occupation sites for Ni. The calculated bulk moment disappears abruptly near 60% Ni concentration. Above the critical concentration of Ni, a metamagnetic transition from the paramagnetic to the ferromagnetic state is found to occur. These calculated results are consistent with the recently observed ones. It has been shown that the anomalous magnetic behaviours of can be explained by the detailed shape of the local density-of-states curve of the 3d-transition-metal atoms at the 3g site near the Fermi level.

show abstract

Section: Conclusion and Discussionmentioning

confidence: 91%

Section: Conclusion and Discussionmentioning

confidence: 99%

Itinerant-electron metamagnetism of

Yamada

Terao

Ishikawa

et al. 1999

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…Moreover, one notes that even at 100 K the magnetoresistivity is still large amounting to about 10%. It is interesting to note that there is a lack, within the limit of experimental error, of any anisotropy in magnetoresistence (MR) and its temperature behavior is more reminiscent, e.g., of the nonspin fluctuator YAl 2 (about 30% at 4.2 K and 8 T) than to YCo 2 , representing the influence of the spin fluctuation (SF) scattering on MR. 26 The behavior of the former compound is considered as being caused by the only mechanism originating from the influence of the magnetic field on the conduction trajectories, the so-called Lorentz force effect, which always leads to an increase in the MR values towards low temperatures due to decreasing electron-phonon scattering. According to Gratz (see Ref.…”

Section: B Electrical Resistivitymentioning

confidence: 99%

Electronic structure, magnetic, and transport studies of single-crystallineUCoGa5

et al. 2004

View full text Add to dashboard Cite

The magnetic susceptibility, electrical resistivity in zero and in magnetic fields up to 8 T, thermopower and thermal conductivity measurements in a wide temperature range have been performed on UCoGa 5 single crystals. On the basis of the susceptibility maximum at 650 K and the phonon part of the thermal conductivity, a mixed-valence state of uranium in this compound has been postulated. On the other hand, a normal positive behavior of magnetoresistivity rules out the possibility of spin fluctuation as a mechanism driving the susceptibility through the maximum. In turn, the thermopower results may support both kinds of many-body behaviors. The electronic structure has also been studied by combining x-ray photoemission spectroscopy results with those obtained in the band structure calculations. In the latter the tight-binding linear muffin-tin orbital method in the atomic sphere approximation has been applied. A very good agreement between the experimental and calculated data has been achieved. A complex satellite structure of the core level spectra supports an idea of the presence of the valence instability in this compound. This idea is also concluded from the comparison of obtained experimental data with some similar rare earth and uranium ternary compounds.

show abstract

“…In addition to iron and nickel, copper has also been used to dope the YCo 5 magnet [20,28,31,33,50,52,53]. In contrast to the Y(Co 1-x Fe x ) 5 system, Y(Co 1-x Ni x ) 5 and Y(Co 1-x Cu x ) 5 compounds are stable across the entire composition domain (i.e., x = 0-1).…”

Section: Introductionmentioning

confidence: 99%

“…Numerous theoretical approaches have been used to study the YCo 5 magnets. These include augmented-plane-waves (APW), point charge, linearized muffin-tin orbitals within atomic sphere approximation (LMTO-ASA), Haydok recursion (HR), full-potential linearized augmented-plane-waves (FLAPW), linear combination of atomic orbitals (LCAO), pseudopotential projected augmented waves (VASP-PAW), augmented spherical waves (ASW-ASA), full-potential linear muffin-tin orbitals (FPLMTO), dynamical mean field theory in conjunction with density functional theory (LDA-DMFT), and Korringa-Kohn-Rostoker multiple-scattering formulation in conjunction with the coherent potential approximation and disordered local moment approximation (KKRASA-CPA-DLM) [21,26,27,30,[37][38][39][40][44][45][46][47][48][49][50][51][55][56][57][58][59][60][61][62][63][64][65]67,68,70,71,[74][75][76][77][78][79][81][82][83][84]. According to the self-consistent APW calculations [21], the total moment of the YCo 5 magnet is equal to m (tot) = 7.31 µ B /f.u., which is in accordance w...…”

Section: Introductionmentioning

confidence: 99%

Thermodynamics and Magnetism of YCo5 Compound Doped with Fe and Ni: An Ab Initio Study

et al. 2020

View full text Add to dashboard Cite

YCo5 permanent magnet exhibits high uniaxial magnetocrystalline anisotropy energy and has a high Curie temperature. These are good properties for a permanent magnet, but YCo5 has a low energy product, which is notably insufficient for a permanent magnet. In order to improve the energy product in YCo5, we suggest replacing cobalt with iron, which has a much bigger magnetic moment. With a combination of density-functional-theory calculations and thermodynamic CALculation of PHAse Diagrams (CALPHAD) modeling, we show that a new magnet, YFe3(Ni1-xCox)2, is thermodynamically stable and exhibits an improved energy product without significant detrimental effects on the magnetocrystalline anisotropy energy or the Curie temperature.

show abstract

Magnetoresistance in Y(Ni1−xCox)5 around the critical concentration for the onset of ferromagnetism

Cited by 4 publications

References 3 publications

Itinerant-electron metamagnetism of

Itinerant-electron metamagnetism of

Electronic structure, magnetic, and transport studies of single-crystallineUCoGa5

Thermodynamics and Magnetism of YCo5 Compound Doped with Fe and Ni: An Ab Initio Study

Contact Info

Product

Resources

About