Low-energy magnetic excitations in double-layered manganite La1.2Sr1.8Mn2O7

被引：24

作者：

Chatterji, T

Thalmeier, P

McIntyre, GJ

van de Kamp, R

Suryanarayanan, R

Dhalenne, G

Revcolevschi, A

机构：

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

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

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

[4] Tech Univ Darmstadt, D-64287 Darmstadt, Germany

[5] Univ Paris 11, CNRS, Lab Chem Solides UA446, F-91405 Orsay, France

来源：

EUROPHYSICS LETTERS | 1999年 / 46卷 / 06期

关键词：

D O I：

10.1209/epl/i1999-00335-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the magnetic correlations and low-energy magnetic excitations in a layered manganite La1.2Sr1.8Mn2O7 which shows colossal magnetoresistance (CMR) behaviour. Our results confirm the coexistence of both ferromagnetic and antiferromagnetic correlations above T-C approximate to 126 K. In addition we have discovered dispersive low-energy magnetic excitations of energy of 0.1-0.4 meV propagating along [001] in the ferromagnetic phase below Te which we have analyzed within an effective exchange model of weakly coupled ferromagnetic double layers.

引用

页码：801 / 807

页数：7

共 12 条

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