Itinerant electron metamagnetism in LaCo9Si4

Autor(en)

Herwig Michor, M El-Hagary, Massimiliano Della Mea, Martin W. Pieper, Michael Reissner, Gerfried Hilscher, S Khmelevskyi, Peter Mohn, Günter Schneider, Gerald Giester, Peter Franz Rogl

Abstrakt

The strongly exchange enhanced Pauli paramagnet LaCo9Si 4 is found to exhibit an itinerant metamagnetic phase transition with indications for metamagnetic quantum criticality. Our investigation comprises magnetic, specific heat, and nuclear magnetic resonance measurements as well as ab initio electronic structure calculations. The critical field is about 3.5 T for H||c and 6 T for H?c, which is the lowest value ever found for rare earth intermetallic compounds. In the ferromagnetic state there appears a moment of about 0.2 œB/Co at the 16k Co-sites, but significantly smaller moments at the 4d and 16l Co-sites.

Organisation(en)

Institut für Mineralogie und Kristallographie, Institut für Physikalische Chemie

Externe Organisation(en)

Technische Universität Wien, Center for Computational Materials Science, CMS

Journal

Physical Review B

Band

69

Seiten

814041-814044

Anzahl der Seiten

4

ISSN

1098-0121

DOI

https://doi.org/10.1103/PhysRevB.69.081404

Publikationsdatum

2004

Peer-reviewed

Ja

ÖFOS 2012

1051 Geologie, Mineralogie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/4c207320-1a97-4111-adfd-536316b2a660