Magneto-elastic lattice collapse in YCo5

Rösner, H.; Koudela, Daniela; Schwarz, Ulrich; Handstein, A.; Hanfland, Michael; Opahle, Ingo; Koepernik, Klaus; Kuz’min, M. D.; Müller, K.‐H.; Mydosh, J. A.; Richter, Manuel

doi:10.1038/nphys341

Cited by 59 publications

(72 citation statements)

References 26 publications

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“…In the YCo 4.5 Ge 0.5 phase, the Co sublattice presents a reduced magnetocrystalline anisotropy comparison with that of the YCo 5 compound. An anisotropy parameter of 2.8 MJ/m 3 has been determined at 4 K. The large magnetocrystalline anisotropy observed at 4 K for YCo 4.5 Ge 0.5 phase is preserved at room temperature.…”

Section: Discussionmentioning

confidence: 95%

“…Materials with this hexagonal structure were especially investigated for possible extremely high magnetocrystalline anisotropy. In spite of their relatively old discovery the RCo 5 type compounds are still attracting much interest nowadays from both the experimental and theoretical point of view in order to deeper understand their intrinsic physical properties such as the magnetoelastic properties [5,6]; the exchange interactions [7,8]; the electronic structure [9,10] or the magnetocrystalline anisotropy [11,12]. * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%

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High magnetic field study of the anisotropy and neutron diffraction investigation of the crystal and magnetic structure of YCo4.5Ge0.5

Colin

Isnard

Guillot

2010

Journal of Alloys and Compounds

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

High magnetic field study of the anisotropy and neutron diffraction investigation of the crystal and magnetic structure of YCo4.5Ge0.5

Colin

Isnard

Guillot

2010

Journal of Alloys and Compounds

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“…In the following we restrict ourselves to LSDA calculations, which are better suited to describe the magnetic behavior in the vicinity of a magnetic instability, due to the tendency of GGA to overestimate the magnetic interactions. LSDA calculations have for example successfully been used to predict a metamagnetic transition in YCo 5 under pressure 26 . The structural optimizations have been performed with spin-polarized calculations in the AF3 structure.…”

Section: B Structural Optimization: Fe Moment As a Function Of Pressurementioning

confidence: 99%

Effect of external pressure on the Fe magnetic moment in undoped LaFeAsO from density functional theory: Proximity to a magnetic instability

et al. 2009

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We investigate the effect of external pressure on the Fe magnetic moment in undoped LaOFeAs within the framework of density functional theory and show that this system is close to a magnetic instability: The Fe moment is found to drop by nearly a factor of 3 within a pressure range of ± 5 GPa around the calculated equilibrium volume. While the Fe moments show an unusually strong sensitivity to the spin arrangement (type of anti-ferromagnetic structure), the low temperature structural distortion is found to have only a minor influence on them. Analysis of the Fermi surface topology and nesting features shows that these properties change very little up to pressures of at least 10 GPa. We discuss the magnetic instability in terms of the itinerancy of this system.

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“…5(a). Recalling that an electronic topological (Lifshitz) transition of magnetoelastic origin was previously reported 55,56 in YCo 5 , one may expect a collapse of the magnetization or a crossover to a low-moment state to occur at rather low pressure in the Y 3 T 13 B 2 and Y 3 Ni 10 Co 3 B 2 compounds. However, the Y 3 Co 13 B 2 compound could be studied only in theory until it will be synthesized as a pure phase.…”

Section: Discussionmentioning

confidence: 99%

First principles calculations, neutron, and x-ray diffraction investigation of Y3Ni13B2, Y3Co13B2, and Y3Ni10Co3B2

Plugaru

Văleanu

Plugaru

et al. 2014

Journal of Applied Physics

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Fully relativistic calculations within the local spin density approximation and the generalized gradient approximation were performed to determine the local spin and orbital magnetic moments, as well as the magnetocrystalline anisotropy energy of Y 3 Ni 13 B 2 , Y 3 Co 13 B 2 , and Y 3 Ni 10 Co 3 B 2 compounds. A weak in-plane magnetic anisotropy is determined for Y 3 Ni 13 B 2 , under the assumption of a crystallographic-like magnetic unit cell and collinear magnetic moments. The calculations predict considerable c-axis anisotropy for Y 3 Co 13 B 2 and Y 3 Ni 10 Co 3 B 2 , but smaller than that of YCo 5 . The values of the magnetocrystalline anisotropy energy correlate well with both the magnitude of the orbital magnetic moment and the orbital magnetic moment anisotropy. The mixing between Co or Ni 3d states and B 2p states, observable at the bottom of the valence band of the 3d metal having a boron atom nearest neighbor, decreases the 3d spin and especially, the 3d orbital magnetic moments. Y 3 Ni 13 B 2 and Y 3 Ni 10 Co 3 B 2 were also investigated by powder neutron diffraction experiments, at temperatures between 1.8 and 249 K. The Co and Ni site averaged magnetic moments calculated in the mixed compound are in fair agreement with the values obtained by the refinement of the magnetic contribution to the diffraction pattern. V C 2014 AIP Publishing LLC.

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Magneto-elastic lattice collapse in YCo5

Cited by 59 publications

References 26 publications

High magnetic field study of the anisotropy and neutron diffraction investigation of the crystal and magnetic structure of YCo4.5Ge0.5

High magnetic field study of the anisotropy and neutron diffraction investigation of the crystal and magnetic structure of YCo4.5Ge0.5

Effect of external pressure on the Fe magnetic moment in undoped LaFeAsO from density functional theory: Proximity to a magnetic instability

First principles calculations, neutron, and x-ray diffraction investigation of Y3Ni13B2, Y3Co13B2, and Y3Ni10Co3B2

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