Electronic state of PuCoGa5 and NpCoGa5 as probed by polarized neutrons

Electronic state of PuCoGa5 and NpCoGa5 as probed by polarized neutrons

By using single crystals and polarized neutrons, we have measured the orbital and spin components of the microscopic magnetization in the paramagnetic state of NpCoGa(5) and PuCoGa(5). The microscopic magnetization of NpCoGa(5) agrees with that observed in bulk susceptibility measurements and the ma...

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Veröffentlicht in:Physical review letters 2008-02, Vol.100 (7), p.076403-076403
Hauptverfasser: Hiess, A, Stunault, A, Colineau, E, Rebizant, J, Wastin, F, Caciuffo, R, Lander, G H
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container_issue 7
container_start_page 076403
container_title Physical review letters
container_volume 100
creator Hiess, A
Stunault, A
Colineau, E
Rebizant, J
Wastin, F
Caciuffo, R
Lander, G H
description By using single crystals and polarized neutrons, we have measured the orbital and spin components of the microscopic magnetization in the paramagnetic state of NpCoGa(5) and PuCoGa(5). The microscopic magnetization of NpCoGa(5) agrees with that observed in bulk susceptibility measurements and the magnetic moment has spin and orbital contributions as expected for intermediate coupling. In contrast, for PuCoGa(5), which is a superconductor with a high transition temperature, the microscopic magnetization in the paramagnetic state is small, temperature-independent, and significantly below the value found with bulk techniques at low temperatures. The orbital moment dominates the magnetization.
doi_str_mv 10.1103/PhysRevLett.100.076403
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title Electronic state of PuCoGa5 and NpCoGa5 as probed by polarized neutrons
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