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

被引：117

作者：

Kleemann, W ^{[1
]}

Dec, J

Lehnen, P

Blinc, R

Zalar, B

Pankrath, R

机构：

[1] Gerhard Mercator Univ Duisburg, Lab Angew Phys, D-47048 Duisburg, Germany

[2] Univ Osnabruck, Fachbereich Phys, D-46069 Osnabruck, Germany

来源：

EUROPHYSICS LETTERS | 2002年 / 57卷 / 01期

关键词：

D O I：

10.1209/epl/i2002-00534-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页码：14 / 19

页数：6

共 25 条

[1] THE RANDOM FIELD ISING-MODEL [J].

BELANGER, DP ;

YOUNG, AP .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1991, 100 (1-3) :272-291

[2] SPIN-GLASSES - EXPERIMENTAL FACTS, THEORETICAL CONCEPTS, AND OPEN QUESTIONS [J].

BINDER, K ;

YOUNG, AP .

REVIEWS OF MODERN PHYSICS, 1986, 58 (04) :801-976

[3] 93Nb NMR of the random-field-dominated relaxor transition in pure and doped SBN -: art. no. 134109 [J].

Blinc, R ;

Gregorovic, A ;

Zalar, B ;

Pirc, R ;

Seliger, J ;

Kleemann, W ;

Lushnikov, SG ;

Pankrath, R .

PHYSICAL REVIEW B, 2001, 64 (13)

[4] RANDOM-FIELD EFFECTS IN SITE-DISORDERED ISING ANTIFERROMAGNETS [J].

CARDY, JL .

PHYSICAL REVIEW B, 1984, 29 (01) :505-507

[5] RELAXOR FERROELECTRICS: AN OVERVIEW [J].

Cross, L. Eric .

FERROELECTRICS, 1994, 151 (01) :305-320

[6] Phase transitions in Sr0.61Ba0.39Nb2O6:Ce3+:: I.: Susceptibility of clusters and domains [J].

Dec, J ;

Kleemann, W ;

Woike, T ;

Pankrath, R .

EUROPEAN PHYSICAL JOURNAL B, 2000, 14 (04) :627-632

[7] Random-field Ising-type transition of pure and doped SBN from the relaxor into the ferroelectric state [J].

Dec, J ;

Kleemann, W ;

Bobnar, V ;

Kutnjak, Z ;

Levstik, A ;

Pirc, R ;

Pankrath, R .

EUROPHYSICS LETTERS, 2001, 55 (06) :781-787

[8] Exact ground-state properties of disordered Ising systems [J].

Esser, J ;

Nowak, U ;

Usadel, KD .

PHYSICAL REVIEW B, 1997, 55 (09) :5866-5872

[9] SCALING AND CRITICAL SLOWING DOWN IN RANDOM-FIELD ISING SYSTEMS [J].

FISHER, DS .

PHYSICAL REVIEW LETTERS, 1986, 56 (05) :416-419

[10] RANDOM FIELD EFFECTS IN DISORDERED ANISOTROPIC ANTI-FERROMAGNETS [J].

FISHMAN, S ;

AHARONY, A .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1979, 12 (18) :L729-L733

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