Field dependence of the magnon dispersion in the Kondo lattice CeCu 2 up to 12 T

R Schedler, Ulrike Witte, Martin Rotter, Michael Loewenhaupt, Wolfgang Schmidt

Veröffentlichungen: Beitrag in FachzeitschriftMeeting Abstract/Conference Paper

Abstract

Ce Cu2 can be classified as a Kondo lattice which shows antiferromagnetic (AF) order below TN =3.5 K [R. Trump, J. Appl. Phys. 69, 4699 (1991)]. The orthorhombic crystal and the simple AF magnetic structure with two magnetic moments in the primitive unit cell requires two magnon modes which are observed in zero and low magnetic fields and well described by spin wave theory. However, at higher fields, at and above 3 T, an unexpected, additional magnetic excitation is observed. In contrast to the two low-energy magnon modes, it exhibits a steeper (factor 2) field dependence and a flat dispersion. Its origin is unclear. Π2005 American Institute of Physics.
OriginalspracheEnglisch
Aufsatznummer10A911
Seiten (von - bis)1-3
Seitenumfang3
FachzeitschriftJournal of Applied Physics
Jahrgang97
Ausgabenummer10
DOIs
PublikationsstatusVeröffentlicht - 2005

ÖFOS 2012

  • 104017 Physikalische Chemie

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