Self-consistent spin-wave theory of layered Heisenberg magnets

被引：97

作者：

Irkhin, VY ^{[1
]}

Katanin, AA ^{[1
]}

Katsnelson, MI ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.60.1082

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The versions of the self-consistent spin-wave theories (SSWT) of two-dimensional Heisenberg ferro- and antiferromagnets with a weak interlayer coupling and/or magnetic anisotropy, that are based on the nonlinear. Dyson-Maleev, Schwinger, and combined boson-pseudofermion representations, are analyzed. Analytical results for the temperature dependences of (sublattice) magnetization and the short-range order parameter, and the critical points are obtained. The influence of external magnetic field is considered. Fluctuation corrections to SSWT are calculated within a random-phase approximation which takes into account correctly leading and next-leading logarithmic singularities. These corrections are demonstrated to improve radically the agreement with experimental data on layered perovskites and other systems. Thus an account of these fluctuations provides a quantitative theory of layered magnets.

引用

页码：1082 / 1099

页数：18

共 59 条

[1] ULTRATHIN FILMS - MAGNETISM ON THE MICROSCOPIC SCALE [J].

ALLENSPACH, R .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1994, 129 (2-3) :160-185

[2]

ANZYGINA TN, 1992, FIZ NIZK TEMP, V18, P261

[3] FUNCTIONAL INTEGRAL THEORIES OF LOW-DIMENSIONAL QUANTUM HEISENBERG MODELS [J].

AROVAS, DP ;

AUERBACH, A .

PHYSICAL REVIEW B, 1988, 38 (01) :316-332

[4]

Auerbach A., 1994, INTERACTING ELECT QU

[5]

BARABANOV AF, 1990, JETP LETT+, V51, P311

[6]

Bary'yakhtar V. G., 1983, Soviet Physics - JETP, V58, P351

[7]

Baryakhtar V. G., 1984, GREENS FUNCTIONS THE

[8]

Baxter R. J., 2007, EXACTLY SOLVED MODEL

[9] SPIN-WAVES AND MAGNETIC ORDERING IN K2MNF4 [J].

BIRGENEAU, RJ ;

GUGGENHEIM, HJ ;

SHIRANE, G .

PHYSICAL REVIEW B, 1973, 8 (01) :304-311

[10] NEUTRON SCATTERING INVESTIGATION OF PHASE TRANSITIONS AND MAGNETIC CORRELATIONS IN 2-DIMENSIONAL ANTIFERROMAGNETS K2NIF4, RB2MNF4, RB2FEF4 [J].

BIRGENEAU, RJ ;

GUGGENHEIM, HJ ;

SHIRANE, G .

PHYSICAL REVIEW B-SOLID STATE, 1970, 1 (05) :2211-+

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