Diffusion critique des neutrons par le fer
The behaviour of the Van Hove function S( q, ω) in the neighborhood of the Curie point ( T c ⩽ T⩽1.04 T c ) has been studied in iron by inelastic neutron scattering at scattering vector q in the range 1.8 × 10 -2 < | q| < 7.1 × 10 -2 A ̊ -1 . The critical exponent z of the diffusion constant Λ...
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Published in | Physics letters. A Vol. 31; no. 10; pp. 561 - 563 |
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Main Authors | , , , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | French |
Published |
Elsevier B.V
18.05.1970
|
Online Access | Get full text |
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Summary: | The behaviour of the Van Hove function
S(
q,
ω) in the neighborhood of the Curie point (
T
c
⩽
T⩽1.04
T
c
) has been studied in iron by inelastic neutron scattering at scattering vector
q in the range
1.8 × 10
-2 < |
q| < 7.1 × 10
-2
A
̊
-1
. The critical exponent
z of the diffusion constant
Λ
o
{(
T−
T
c
)/
T
c
}
z
has been found equal to 0.36 ± 0.06 in a region of space (
q,
T) where the relaxation seems to be hydrodynamic in character. |
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ISSN: | 0375-9601 1873-2429 |
DOI: | 10.1016/0375-9601(70)90353-1 |