A high-energy inelastic neutron scattering investigation of the Gd–Co exchange interactions in GdCo4B: Comparison with density-functional calculations | Zendy

O. Isnard | Zendy; M. D. Kuz’min | Zendy; Manuel Richter | Zendy; M. Loewenhaupt | Zendy; Robert Bewley | Zendy

Open Access

A high-energy inelastic neutron scattering investigation of the Gd–Co exchange interactions in GdCo4B: Comparison with density-functional calculations

Author(s) -

O. Isnard,

M. D. Kuz’min,

Manuel Richter,

M. Loewenhaupt,

Robert Bewley

Publication year - 2008

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.2953099

Subject(s) - inelastic neutron scattering , magnetic moment , chemistry , inelastic scattering , neutron , scattering , atomic physics , neutron scattering , density functional theory , condensed matter physics , crystal (programming language) , coupling constant , neutron diffraction , crystal structure , molecular physics , crystallography , physics , nuclear physics , computational chemistry , particle physics , computer science , optics , programming language

International audienceInelastic neutron scattering is used to quantify the Gd-Co exchange interaction in GdCo4B. A significant reduction is observed in comparison with the GdCo5 compound. A mean value of 130 T is obtained for the exchange field on the two Gd sites in GdCo4B. The experimental results are compared with density-functional calculations. The local atomic magnetic moments calculated using the LSDA+U approximation are reported for each atomic site of the GdCo4B crystal structure. These calculations demonstrate that the two nonequivalent Gd crystal sites experience a significantly different exchange interaction, a difference that is discussed in the light of the local atomic environment. The observed reduction of the exchange field occurring upon substituting B for Co in GdCo5 is mainly caused by the decrease of the Co magnetic moment, whereas the Gd-Co coupling constant is found to be almost the same in both GdCo5 and GdCo4B

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research