Original magnetic behaviour observed in RNi5−xCux alloys (R = Pr, Gd or Y)

Кучин, А. Г.; Ermolenko, A. S.; Khrabrov, V. I.; Makarova, G. M.; Belozerov, E. V.

doi:10.1016/0304-8853(96)00322-8

Cited by 33 publications

(34 citation statements)

References 11 publications

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“…At the experimental values of the lattice parameters we were unable to obtain stable induced moments in our calculations for these compounds. When the external field was «turned off», however, spontaneous spin polarization did not arise in YNi 5 and LaNi 5 systems during the self-consistent calculations of the electronic structure, in agreement with the experimental data [47,[50][51][52][53]. The spontaneous spin polarization found in the calculations of Refs.…”

Section: Magnetic-field-induced Effects In the Electronic Structure Osupporting

confidence: 84%

“…As seen from the table, for this compound the spin contribution χ spin is obviously dominant, but the Van Vleck term χ orb , which comes mainly from the electrons in the atomic sphere of Ce, amounts to about 20% of the total susceptibility (to be compared with 11% in YNi 5 and LaNi 5 ). The sum of the self-consistently calculated at the theoretical lattice parameter χ spin and χ orb contributions provides a perfect agreement with the experiment for CeNi 5 [47,52,55,56]. The calculated volume derivative of susceptibility d ln χ /d ln V is also listed in Table 4 and appears to be in agreement with the corresponding derivative from the experimental studies of the pressure effect on χ for CeNi 5 [56] at T = 77.3 K.…”

Section: Magnetic-field-induced Effects In the Electronic Structure Osupporting

confidence: 69%

“…The compound LaNi 5 is promising for hydrogen storage, since the unit cell of this compound can store up to 7 hydrogen atoms. There are indications that substitution of some amount of nickel in RNi 5 compounds with other metals (Al, Co, Cr, Cu, Mn) alters their structural, electronic, and magnetic properties and can also improve their electrochemical characteristics [47]. In this work a detailed investigation of magnetic properties and electronic structure of RNi 5 (R = Y, La, Ce) compounds and YNi 5−x Cu x alloys was carried out by means of the first-principles calculations of their electronic structure and magnetic properties.…”

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

“…It has been observed [47] that with increasing copper concentration x in YNi 5−x Cu x alloys, their magnetic susceptibility varies nonmonotonically and reaches a maximum at x ; 0 3…”

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

“…In general, the nonmagnetic copper impurity enhances the paramagnetism of RNi 5−x Cu x alloys in the region 0 1 < < x . This effect is the most pronounced in alloys with cerium and less pronounced in alloys with lanthanum [47,55,56]. The presence of a peak in N E ( ) slightly above the Fermi level in the RNi 5 compounds (see Fig.…”

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

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Magnetic-field-induced effects in the electronic structure of itinerant d- and f-metal systems

Grechnev

2009

Low Temperature Physics

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A paramagnetic response of transition metals and itinerant d-and f -metal compounds in an external magnetic field is studied by employing ab initio full-potential LMTO method in the framework of the local spin density approximation. Within this method the anisotropy of magnetic susceptibility in hexagonal close-packed transition metals is evaluated for the first time. This anisotropy is owing to the orbital Van Vleck-like paramagnetic susceptibility, which is revealed to be substantial in transition metal systems due to hybridization effects in electronic structure. It is demonstrated, that compounds TiCo, Ni 3 Al, YCo 2 , CeCo 2 , YNi 5 , LaNi 5 and CeNi 5 are strong paramagnets close to the quantum critical point. For these systems the Stoner approximation underestimates the spin susceptibility, whereas the calculated field-induced spin moments provided a good description of the large paramagnetic susceptibilities and magnetovolume effects. It is revealed, that itinerant description of hybridized f electrons produces magnetic properties of CeCo 2 , CeNi 5 , UAl 3 , UGa 3 , USi 3 and UGe 3 compounds in close agreement with experiment. In the uranium UX 3 compounds the strong spin-orbit coupling together with hybridization effects give rise to peculiar magnetic states, where the field-induced spin moments are antiparallel to the external field and the magnetic response is dominated by the orbital contribution.

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Section: Magnetic-field-induced Effects In the Electronic Structure Osupporting

confidence: 84%

Section: Magnetic-field-induced Effects In the Electronic Structure Osupporting

confidence: 69%

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

“…It has been observed [47] that with increasing copper concentration x in YNi 5−x Cu x alloys, their magnetic susceptibility varies nonmonotonically and reaches a maximum at x ; 0 3…”

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

Section: Magnetic-field-induced Effects In the Electronic Structure Omentioning

confidence: 99%

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