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Title: Optically induced magnetic polarons in EuTe

Direct measurements of the photoinduced magnetization in EuTe, using a two color pump-and-probe technique, are presented. The photoinduced effect was pumped using photons of above-the-bandgap energy, and detected by the Faraday rotation of a probe beam of energy below-the-bandgap. The photoinduced Faraday rotation changes sign, as expected from our model for the optically induced magnetic polaron. The EuTe spin-flop transition at low fields is also detected as a sharp step in the photoinduced Faraday rotation, and its observation provides additional supports for the photoinduced polaron model.
Authors:
;  [1] ; ;  [2]
  1. Instituto de Física, Universidade de São Paulo, Caixa Postal 66318, 05315-970, São Paulo (Brazil)
  2. LAS - INPE, Av. Dos Astronautas, 1758, 12227-010, São José dos Campos (Brazil)
Publication Date:
OSTI Identifier:
22261853
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1566; Journal Issue: 1; Conference: ICPS 2012: 31. international conference on the physics of semiconductors, Zurich (Switzerland), 29 Jul - 3 Aug 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EUROPIUM TELLURIDES; FARADAY EFFECT; MAGNETIZATION; PHOTONS; POLARONS; SPIN