Mn K-edge XMCD in Mn3MC (M = Zn and Ga) perovskite

Citation
S. Uemoto et al., Mn K-edge XMCD in Mn3MC (M = Zn and Ga) perovskite, J SYNCHROTR, 8, 2001, pp. 449-451
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF SYNCHROTRON RADIATION
ISSN journal
0909-0495 → ACNP
Volume
8
Year of publication
2001
Part
2
Pages
449 - 451
Database
ISI
SICI code
0909-0495(200103)8:<449:MKXIM(>2.0.ZU;2-I
Abstract
Mn3MC (M= Zn and Ga) perovskite has attracted interest because of a variety of magnetic phase transitions. In this work, we measure temperature and ma gnetic field dependence of X-ray magnetic circular dichroism (XMCD) at Mn K -edge and discuss effect of second constituent metal on the magnetic states of Mn atoms. The spectrum in Mn3ZnC is characterized by a dispersion-type profile. In Mn3GaC, intensity of the positive peak at the edge is drastical ly reduced. The difference originates in charge transfer from Zn or Ga to M n atoms. Temperature and magnetic field variations of the Mn K-edge XMCD sp ectrum suggest that orbital magnetic moments are closely related to the mag netic phase transition.