Spin waves in the quasi-two-dimensional ferromagnetic bilayer manganite La1.2Sr1.8Mn2O7

被引：45

作者：

Chatterji, T

Regnault, LP

Thalmeier, P

Suryanarayanan, R

Dhalenne, G

Revcolevschi, A

机构：

[1] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

[2] Max Planck Inst Komplexer Syst, Dresden, Germany

[3] Ctr Etud Nucl, DRFMC, SPSMS, MDN, F-38054 Grenoble 9, France

[4] Max Planck Inst Chem Phys Fester Stoffe, Dresden, Germany

[5] Univ Paris 11, CNRS, UA 446, Lab Chim Solides, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.60.R6965

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have used inelastic-neutron-scattering measurements to investigate the magnetic excitations in a layered manganite La1.2Sr1.8Mn2O7 which shows colossal magnetoresistance behavior. We have measured the dispersion of both the acoustic and the optic modes along [100] and [001]. By analyzing these results within an effective exchange model of weakly coupled ferromagnetic bilayers we have determined the complete set of intra- and interbilayer exchange interactions of an effective localized spin model. We discuss evidence for the quasi-two-dimensional ferromagnetism in this compound. [S0163-1829(99)51034-5].

引用

页码：R6965 / R6968

页数：4

共 11 条

[1] Unconventional magnetostriction in layered La1.2Sr1.8Mn2O7: Evidence for spin-lattice coupling above T-C [J].