NEAR-SURFACE CRITICAL X-RAY-SCATTERING FROM FE3AL

被引：56

作者：

MAILANDER, L ^{[1
]}

DOSCH, H ^{[1
]}

PEISL, J ^{[1
]}

JOHNSON, RL ^{[1
]}

机构：

[1] UNIV HAMBURG,INST EXPTL PHYS 2,W-2000 HAMBURG 50,GERMANY

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.64.2527

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report measurements of near-surface critical x-ray scattering in Fe3Al. The radial distribution of the critical diffuse intensity around a superlattice reflection exhibits a cusplike shape at the critical temperature Tc. From this distribution we determined for the first time the critical surface exponent =1.52±0.04, which agrees well with the prediction for the ordinary transition of a semi-infinte Ising system and shows that the lateral correlations near the surface decay much faster than in the bulk. © 1990 The American Physical Society.

引用

页码：2527 / 2530

页数：4

共 11 条

[1] COHERENT AND INCOHERENT EQUILIBRIA IN IRON-RICH IRON-ALUMINUM ALLOYS [J].

ALLEN, SM ;

CAHN, JW .

ACTA METALLURGICA, 1975, 23 (09) :1017-1026

[2] SURFACE MAGNETISM OF NI(100) NEAR THE CRITICAL REGION BY SPIN-POLARIZED ELECTRON-SCATTERING [J].

ALVARADO, S ;

CAMPAGNA, M ;

HOPSTER, H .

PHYSICAL REVIEW LETTERS, 1982, 48 (01) :51-54

[3]

[Anonymous], 1983, PHASE TRANSITIONS CR

[4]

DIEHL HWJ, 1983, PHASE TRANSITIONS CR, V10

[5] CRITICAL SURFACE SCATTERING OF X-RAYS AT GRAZING ANGLES [J].

DIETRICH, S ;

WAGNER, H .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1984, 56 (03) :207-215

[6] EVANESCENT ABSORPTION IN KINEMATIC SURFACE BRAGG-DIFFRACTION [J].

DOSCH, H .

PHYSICAL REVIEW B, 1987, 35 (05) :2137-2143

[7] UNIVERSAL AMPLITUDES FOR CRITICAL SURFACE SCATTERING [J].

GOMPPER, G .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 62 (03) :357-366

[8] VARIATION OF LONG-RANGE ORDER IN FE3AL NEAR ITS TRANSITION TEMPERATURE [J].

GUTTMAN, L ;

SCHNYDERS, HC ;

ARAI, GJ .

PHYSICAL REVIEW LETTERS, 1969, 22 (11) :517-+

[9] CRITICAL SCATTERING OF X-RAYS FROM FE3AL [J].

GUTTMAN, L ;

SCHNYDERS, HC .

PHYSICAL REVIEW LETTERS, 1969, 22 (11) :520-+

[10]

LIED A, COMMUNICATION

← 1 2 →