Equilibrium random-field Ising critical scattering in the antiferromagnet Fe0.93Zn0.07F2

被引：52

作者：

Slanic, Z ^{[1
]}

Belanger, DP

Fernandez-Baca, JA

机构：

[1] Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA

[2] Oak Ridge Natl Lab, Div Solid State, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 02期

关键词：

D O I：

10.1103/PhysRevLett.82.426

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

It has long been believed that equilibrium random-field Ising model (RFIM) critical scattering studies are not feasible in dilute antiferromagnets close to and below T-c(H) because of severe nonequilibrium effects. The high magnetic concentration Ising antiferromagnet Fe0.93Zn0.07F2, however, does provide equilibrium behavior. We have employed scaling techniques to extract the universal equilibrium scattering line shape, critical exponents v = 0.87 +/- 0.07 and eta = 0.20 + 0.05, and amplitude ratios of this RFIM system.

引用

页码：426 / 429

页数：4

共 30 条

[1] Critical exponents of the three-dimensional diluted Ising model [J].

Ballesteros, HG ;

Fernandez, LA ;

Martin-Mayor, V ;

Sudupe, AM ;

Parisi, G ;

Ruiz-Lorenzo, JJ .

PHYSICAL REVIEW B, 1998, 58 (05) :2740-2747

[2]

Belanger D. P., 1998, SPIN GLASSES RANDOM, P251

[3] NEUTRON-SCATTERING OBSERVATIONS OF EXTREME CRITICAL SLOWING DOWN IN A D=3 RANDOM-FIELD SYSTEM [J].

BELANGER, DP ;

JACCARINO, V ;

KING, AR ;

NICKLOW, RM .

PHYSICAL REVIEW LETTERS, 1987, 59 (08) :930-933

[4] X-Ray and neutron scattering, magnetization, and heat capacity study of the 3D random field Ising model - Comment [J].

Belanger, DP ;

Kleemann, W ;

Montenegro, FC .

PHYSICAL REVIEW LETTERS, 1996, 77 (11) :2341-2341

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

BELANGER, DP ;

YOUNG, AP .

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

[6] RANDOM-FIELD CRITICAL-BEHAVIOR OF A D=3 ISING SYSTEM - NEUTRON-SCATTERING STUDIES OF FE0.6ZN0.4F2 [J].

BELANGER, DP ;

KING, AR ;

JACCARINO, V .

PHYSICAL REVIEW B, 1985, 31 (07) :4538-4547

[7] Magnetic order in the random-field Ising film Fe0.52Zn0.48F2 [J].

Belanger, DP ;

Wang, J ;

Slanic, Z ;

Han, SJ ;

Nicklow, RM ;

Lui, M ;

Ramos, CA ;

Lederman, D .

PHYSICAL REVIEW B, 1996, 54 (05) :3420-3427

[8] CROSSOVER FROM RANDOM-EXCHANGE TO RANDOM-FIELD CRITICAL-BEHAVIOR IN FEXZN1-XF2 [J].

BELANGER, DP ;

KING, AR ;

JACCARINO, V .

PHYSICAL REVIEW B, 1986, 34 (01) :452-455

[9] NEUTRON-SCATTERING AND THE CRITICAL-BEHAVIOR OF THE 3-DIMENSIONAL ISING ANTIFERROMAGNET FEF2 [J].

BELANGER, DP ;

YOSHIZAWA, H .

PHYSICAL REVIEW B, 1987, 35 (10) :4823-4830

[10] MAGNETIC-FIELD-INDUCED GRIFFITHS PHASE VERSUS RANDOM-FIELD CRITICALITY AND DOMAIN-WALL SUSCEPTIBILITY OF FE0.47ZN0.53F2 [J].

BINEK, C ;

KUTTLER, S ;

KLEEMANN, W .

PHYSICAL REVIEW LETTERS, 1995, 75 (12) :2412-2415

← 1 2 3 →