volume 95 issue 4 publication number 045205

Photoinduced giant magnetic polarons in EuTe

Publication typeJournal Article
Publication date2017-01-13
scimago Q1
wos Q2
SJR1.303
CiteScore6.2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Abstract
Photoinduced magnetic polarons in EuTe, with a magnetic moment of several hundred Bohr magnetons, were investigated as a function of pump intensity and temperature by pump-probe Faraday rotation. The quantum efficiency for optical generation of magnetic polarons is found to be 0.09. The pump-intensity dependence of the photoinduced Faraday rotation shows a sublinear increase, from which we deduce that the population of photoexcited polarons is limited by a maximum value of 4.5 × 10 15 cm − 3 . This is four orders of magnitude less than the concentration of polarons that would completely fill the crystal, which suggests that the photoexcited polarons are anchored by defects. In addition to the generation of polarons, at high pump densities the modulated pump light also causes a small alternating heating of the illuminated region. The temperature dependence of the polaron magnetic moment is well described by the Curie–Weiss law. Above 100 K, polarons are thermally quenched with an activation energy of 11 meV.
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HENRIQUES A. B. et al. Photoinduced giant magnetic polarons in EuTe // Physical Review B. 2017. Vol. 95. No. 4. 045205
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HENRIQUES A. B., Henriques A. C., Naupa A. R., Usachev P. A., Usachev P. A., Pavlov V. V., Pavlov V. V., Rappl P. H. O., Rappl P., Abramof, E., Abramof E. Photoinduced giant magnetic polarons in EuTe // Physical Review B. 2017. Vol. 95. No. 4. 045205
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RIS Copy
TY - JOUR
DO - 10.1103/physrevb.95.045205
UR - https://doi.org/10.1103/physrevb.95.045205
TI - Photoinduced giant magnetic polarons in EuTe
T2 - Physical Review B
AU - HENRIQUES, A. B.
AU - Henriques, A. C.
AU - Naupa, A. R.
AU - Usachev, P A
AU - Usachev, P. A.
AU - Pavlov, V V
AU - Pavlov, Victor V.
AU - Rappl, P. H. O.
AU - Rappl, P.H.O.
AU - Abramof,, E.
AU - Abramof, E.
PY - 2017
DA - 2017/01/13
PB - American Physical Society (APS)
IS - 4
VL - 95
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
Cite this
BibTex (up to 50 authors) Copy
@article{2017_HENRIQUES,
author = {A. B. HENRIQUES and A. C. Henriques and A. R. Naupa and P A Usachev and P. A. Usachev and V V Pavlov and Victor V. Pavlov and P. H. O. Rappl and P.H.O. Rappl and E. Abramof, and E. Abramof},
title = {Photoinduced giant magnetic polarons in EuTe},
journal = {Physical Review B},
year = {2017},
volume = {95},
publisher = {American Physical Society (APS)},
month = {jan},
url = {https://doi.org/10.1103/physrevb.95.045205},
number = {4},
pages = {045205},
doi = {10.1103/physrevb.95.045205}
}