TY - JOUR
T1 - Critical harmonic scattering in NH4Cl
AU - Freund, Isaac
PY - 1967
Y1 - 1967
N2 - Observations of harmonic scattering (second-harmonic generation) by fluctuations in angular orientation are reported for polycrystalline NH4Cl for temperatures in the immediate vicinity of the second-order phase transition at ∼242.4°K. Harmonic intensities were found to decrease exponentially within the range 2×10-4<~ε<2×10-2, where ε=TTc-1. The results, together with suitable assumptions, are used to obtain an estimate of the variation of the long-range correlation parameter κ-1 with ε, with results different from those expected.
AB - Observations of harmonic scattering (second-harmonic generation) by fluctuations in angular orientation are reported for polycrystalline NH4Cl for temperatures in the immediate vicinity of the second-order phase transition at ∼242.4°K. Harmonic intensities were found to decrease exponentially within the range 2×10-4<~ε<2×10-2, where ε=TTc-1. The results, together with suitable assumptions, are used to obtain an estimate of the variation of the long-range correlation parameter κ-1 with ε, with results different from those expected.
UR - http://www.scopus.com/inward/record.url?scp=33751304693&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.19.1288
DO - 10.1103/PhysRevLett.19.1288
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AN - SCOPUS:33751304693
SN - 0031-9007
VL - 19
SP - 1288
EP - 1291
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
ER -