Uniaxial relaxor ferroelectrics: The ferroic random-field Ising model materialized at last

Autor(en): Kleemann, W
Dec, J
Lehnen, P
Blinc, R
Zalar, B
Pankrath, R
Stichwörter: ANTIFERROMAGNET; CRITICAL-BEHAVIOR; DOMAIN STATES; PHASE-TRANSITIONS; Physics; Physics, Multidisciplinary; SYSTEMS
Erscheinungsdatum: 2002
Herausgeber: E D P SCIENCES
Journal: EUROPHYSICS LETTERS
Volumen: 57
Ausgabe: 1
Startseite: 14
Seitenende: 19
Zusammenfassung: 
Owing to their intrinsic charge disorder ferroelectric crystals of strontium-barium-niobate doped with Ce3+ materialize the three-dimensional ferroic random-field Ising model (RFIM) as evidenced by order paramenter and susceptibility criticalities with Nb-93 NMR and dielectric spectroscopy, respectively. Upon cooling towards T-c, extreme critical slowing-down due to activated dynamic scaling gives rise to relaxor-like dispersion of the susceptibility and to a metastable ferroelectric nanodomain state with fractal size distribution as imaged by piezoelectric force microscopy.
ISSN: 02955075
DOI: 10.1209/epl/i2002-00534-y

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