Thermodynamics of the frustrated one-dimensional spin-1/2 Heisenberg ferromagnet in a magnetic field

被引：16

作者：

Haertel, M. ^{[1
]}

Richter, J. ^{[1
]}

Ihle, D. ^{[2
]}

机构：

[1] Otto VonGuericke Univ Magdegurg, Inst Theoret Phys, D-39016 Magdeburg, Germany

[2] Univ Leipzig, Inst Theoret Phys, D-04109 Leipzig, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 21期

关键词：

SHORT-RANGE ORDER; WEAK FERROMAGNETISM; P-NPNN; CHAIN; MODEL; HELIMAGNETISM; LICUVO4; STATE;

D O I：

10.1103/PhysRevB.83.214412

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the low-temperature thermodynamic quantities (magnetization, correlation functions, transverse and longitudinal correlation lengths, spin susceptibility, and specific heat) of the frustrated one-dimensional spin-half J(1)-J(2) Heisenberg ferromagnet, i.e., for J(2) < 0.25|J(1)|, in an external magnetic field using a second-order Green-function formalism and full diagonalization of finite systems. We determine power-law relations for the field dependence of the position and the height of the maximum of the uniform susceptibility. Considering the specific heat at low magnetic fields, two maxima in its temperature dependence are found.

引用

页数：8

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