Critical behavior at the nematic-to-smectic-A transition in a strong magnetic field

Andrew Primak; Michael Fisch; Satyendra Kumar

Critical behavior at the nematic-to-smectic-A transition in a strong magnetic field

Andrew Primak
, Michael Fisch
, Satyendra Kumar

Grants Development

University at Albany

Kent State University

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

The critical exponents ν_∥⊥ and γ at the NA transition in three compounds were measured under a 5 T field. The transverse resolution was rendered to be essentially the same as the instrumental resolution. The effects of mosaicity at low fields in D6.15AOB were clearly observed. The mosaicity correction necessary to restore the true values of critical exponents was found to be temperature independent but ∼3.5 times smaller than the width of the sharpest q⊥ scan. Finally, it was observed that the fourth-order coefficient in the structure factor is mosaicity independent.

Original language	English
Article number	035701
Pages (from-to)	035701/1-035701/4
Journal	Physical Review Letters
Volume	88
Issue number	3
State	Published - Jan 21 2002

Cite this

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abstract = "The critical exponents ν∥⊥ and γ at the NA transition in three compounds were measured under a 5 T field. The transverse resolution was rendered to be essentially the same as the instrumental resolution. The effects of mosaicity at low fields in D6.15AOB were clearly observed. The mosaicity correction necessary to restore the true values of critical exponents was found to be temperature independent but ∼3.5 times smaller than the width of the sharpest q⊥ scan. Finally, it was observed that the fourth-order coefficient in the structure factor is mosaicity independent.",

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N2 - The critical exponents ν∥⊥ and γ at the NA transition in three compounds were measured under a 5 T field. The transverse resolution was rendered to be essentially the same as the instrumental resolution. The effects of mosaicity at low fields in D6.15AOB were clearly observed. The mosaicity correction necessary to restore the true values of critical exponents was found to be temperature independent but ∼3.5 times smaller than the width of the sharpest q⊥ scan. Finally, it was observed that the fourth-order coefficient in the structure factor is mosaicity independent.

AB - The critical exponents ν∥⊥ and γ at the NA transition in three compounds were measured under a 5 T field. The transverse resolution was rendered to be essentially the same as the instrumental resolution. The effects of mosaicity at low fields in D6.15AOB were clearly observed. The mosaicity correction necessary to restore the true values of critical exponents was found to be temperature independent but ∼3.5 times smaller than the width of the sharpest q⊥ scan. Finally, it was observed that the fourth-order coefficient in the structure factor is mosaicity independent.

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Critical behavior at the nematic-to-smectic-A transition in a strong magnetic field

Abstract

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