TY - JOUR
T1 - High pressure neutron diffraction studies of the magnetic structures of erbium
AU - Kawano, S.
AU - Sørensen, S.Å.
AU - Lebech, B.
AU - Achiwa, N.
PY - 1995
Y1 - 1995
N2 - The magnetic structures of single crystal Er were investigated by neutron diffraction at 11.5 and 14 kbar hydrostatic pressure. At 4.5 K, the spin structure is cycloidal in the ac-plane, not conical. At 14 kbar, the cycloidal configuration persists up to TCYP = (46 ± 1) K, where it changes to a longitudinal modulated structure which finally becomes paramagnetic above TN = (82 ± 1) K. The modulation vector Q = 2 7 × ( 2π c) × c ̂ at 4.5 K, and remains nearly constant up to ∼ 30 K. Above ∼ 30 K, Q increases to reach a maximum slightly above TCYP . For further increase in temperature, Q decreases. The data at 11.5 and 14 kbar agree qualitatively.
AB - The magnetic structures of single crystal Er were investigated by neutron diffraction at 11.5 and 14 kbar hydrostatic pressure. At 4.5 K, the spin structure is cycloidal in the ac-plane, not conical. At 14 kbar, the cycloidal configuration persists up to TCYP = (46 ± 1) K, where it changes to a longitudinal modulated structure which finally becomes paramagnetic above TN = (82 ± 1) K. The modulation vector Q = 2 7 × ( 2π c) × c ̂ at 4.5 K, and remains nearly constant up to ∼ 30 K. Above ∼ 30 K, Q increases to reach a maximum slightly above TCYP . For further increase in temperature, Q decreases. The data at 11.5 and 14 kbar agree qualitatively.
KW - Materialer med særlige fysiske og kemiske egenskaber
U2 - 10.1016/0304-8853(94)00756-X
DO - 10.1016/0304-8853(94)00756-X
M3 - Journal article
SN - 0304-8853
VL - 140-144
SP - 763
EP - 764
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
IS - Part 2
ER -