Magnetic polarons and magnetoresistance in EuB6

Abstract

EuB6 is a low carrier density ferromagnet which exhibits large magnetoresistance, positive or negative depending on temperature. The formation of magnetic polarons just above the magnetic critical temperature has been suggested by spin-flip Raman scattering experiments. We find that the fact that EuB6 is a semimetal has to be taken into account to explain its electronic properties, including magnetic polarons and magnetoresistance.

6 pages, 1 figure

References in corpus (5)

• Magnetoresistance in Mn pyrochlore: electrical transport in a low carrier density ferromagnet
• Magnetic Polarons and the Metal-Semiconductor Transition in (Eu,La)B6 and EuO: Raman Scattering Studies
• Electronic transport in EuB${}_6$
• Fluctuation induced hopping and spin polaron transport
• Stability and dynamics of free magnetic polarons

Cited by in corpus (11)

• Magnetically-driven electronic phase separation in the semimetallic ferromagnet EuB${}_6$
• Magneto-optical evidence of double exchange in a percolating lattice
• Magnetic and electronic properties of Eu${}_5$In${}_2$Sb${}_6$
• Gradual transition from insulator to semimetal of Ca${}_{1-x}$Eu${}_x$B${}_6$ with increasing Eu concentration
• Anomalous magnetoresistance of EuB${}_{5.99}$C${}_{0.01}$: Enhancement of magnetoresistance in systems with magnetic polarons
• Magneto-optical behaviour of EuIn_2P_2
• Electronic phase separation due to magnetic polaron formation in the semimetallic ferromagnet EuB${}_6$ - A weakly-nonlinear-transport study
• Effect of pressure on electric transport properties of carbon-doped EuB6
• Magneto-optical imaging of stepwise magnetic domain disintegration at characteristic temperatures in EuB_6
• Evidence formagnetic phase separation in colossal magnetoresistance compound EuB5.99C0.01
• Electron self-trapping and fluctuation density-of-states tail at the critical point