Thermoreflectance investigation of the antiferromagnetic and paramagnetic phases of Cr

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.1653· OSTI ID:6164254

Colavita, E; Franciosi, A; Lynch, D W; Paolucci, G; Rosei, R

Thermoreflectance measurements have been performed on Cr single crystals at several temperatures above and below the Neel temperature. We observe dramatic changes induced by the magnetic phase transition. In contrast, static optical data fail to show appreciable differences in the (0.5--5.0)-eV photon-energy range. Magnetic ordering gives rise to the disappearance of transitions involving specific regions of the Fermi surface. New critical-point absorptions appear at the boundaries of the new Brillouin zone in antiferromagnetic Cr. Most of the observed experimental features have been identified by comparison with recent band-structure calculations.

• Research Organization: Istituto di Fisica G. Marconi, Universita di Roma, Rome, Italy and Dipartimento di Fisica, Universita della Calabria, Arcavacata di Rende, Cosenza, Italy
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6164254
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ANTIFERROMAGNETISM
BAND THEORY
BRILLOUIN ZONES
CHROMIUM
CRYSTALS
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY GAP
ENERGY LEVELS
FERMI LEVEL
HYBRIDIZATION
MAGNETISM
METALS
MONOCRYSTALS
OPTICAL PROPERTIES
PARAMAGNETISM
PHYSICAL PROPERTIES
REFLECTIVITY
SURFACE PROPERTIES
TRANSITION ELEMENTS
ZONES