Phenomenological Versus Microscopic Interpretation of Incommensurate Systems -BCCD and the ANNNI-Model

• Authors: G. Schaack
• Languages of publication: EN

Abstracts

EN

Phenomenological and microscopic models to treat modulated crystal structures are reviewed. Their applicability to interpret the specific phase diagram of betaine-calciumchloride-dihydrate (BCCD), which is of the "incomplete devils,s staircase" type, is critically discussed. Some experimental observations, which emphasize the fractal topology of the BCCD phase diagram, have been compiled. They support the preference of microscopic approaches as the ANNNI-model over the classic Landau theory for this specific case.

Keywords

EN

64.60.-i; 64.70.Rh; 77.80.Bh

Discipline

• 64.60.-i: General studies of phase transitions(see also 63.70.+h Statistical mechanics of lattice vibrations and displacive phase transitions; for critical phenomena in solid surfaces and interfaces, and in magnetism, see 68.35.Rh, and 75.40.-s, respectively)
• 64.70.Rh: Commensurate-incommensurate transitions

• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 83
• Issue: 4
• Pages: 451-462

Dates

published

1993-04

received

1992-10-05

(unknown)

1993-01-05

Contributors

author

G. Schaack

• Physikalisches Institut der Universität Würzburg, Am Hubland, 8700 Würzburg, Germany

Identifiers

DOI

10.12693/APhysPolA.83.451