TY - JOUR
T1 - Evidence for Ferromagnetic Clusters in the Colossal-Magnetoresistance Material EuB6
AU - Pohlit, Merlin
AU - Rößler, Sahana
AU - Ohno, Yuzo
AU - Ohno, Hideo
AU - Von Molnár, Stephan
AU - Fisk, Zachary
AU - Müller, Jens
AU - Wirth, Steffen
N1 - Funding Information:
M. P. and J. M. acknowledge technical support from A. Amyan. S. R. and S. W. acknowledge support by the DFG through SPP 1666.
Publisher Copyright:
© 2018 American Physical Society. © 2018 American Physical Society.
PY - 2018/6/19
Y1 - 2018/6/19
N2 - We combined scanning tunneling microscopy and locally resolved magnetic stray field measurements on the ferromagnetic semimetal EuB6, which exhibits a complex ferromagnetic order and a colossal magnetoresistance effect. In a zero magnetic field, scanning tunneling spectroscopy visualizes the existence of local inhomogeneities in the electronic density of states, which we interpret as the localization of charge carriers due to the formation of magnetic polarons. Micro-Hall magnetometry measurements of the total stray field emanating from the end of a rectangular-shaped platelike sample reveals evidence for magnetic clusters also in finite magnetic fields. In contrast, the signal detected below the faces of the magnetized sample measures a local stray field indicating the formation of pronounced magnetic inhomogeneities consistent with large clusters of percolated magnetic polarons.
AB - We combined scanning tunneling microscopy and locally resolved magnetic stray field measurements on the ferromagnetic semimetal EuB6, which exhibits a complex ferromagnetic order and a colossal magnetoresistance effect. In a zero magnetic field, scanning tunneling spectroscopy visualizes the existence of local inhomogeneities in the electronic density of states, which we interpret as the localization of charge carriers due to the formation of magnetic polarons. Micro-Hall magnetometry measurements of the total stray field emanating from the end of a rectangular-shaped platelike sample reveals evidence for magnetic clusters also in finite magnetic fields. In contrast, the signal detected below the faces of the magnetized sample measures a local stray field indicating the formation of pronounced magnetic inhomogeneities consistent with large clusters of percolated magnetic polarons.
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U2 - 10.1103/PhysRevLett.120.257201
DO - 10.1103/PhysRevLett.120.257201
M3 - Article
C2 - 29979066
AN - SCOPUS:85049020373
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 25
M1 - 257201
ER -