Raman scattering study of temperature- and field-dependent magnetic polaron formation in (Eu,Gd)O

H. Rho; C. S. Snow; S. L. Cooper; Z. Fisk; A. Comment; J. P.H. Ansermet

doi:10.1142/s0217979202014425

Raman scattering study of temperature- and field-dependent magnetic polaron formation in (Eu,Gd)O

H. Rho, C. S. Snow, S. L. Cooper, Z. Fisk, A. Comment, J. P.H. Ansermet

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Abstract

We use Raman scattering to investigate magnetic polarons and spin-career interaction effects in the (Eu, Gd)O system. Raman scattering studies reveal great richness in the phase behavior of this system: a spin-fluctuation-dominated paramagnetic (PM) phase regime for T > T* > Tc, a two-phase regime for T < T* in which magnetic polarons develop below T* and coexist with a remnant of the PM phase, and an inhomogeneous ferromagnetic phase regime for T < Tc. We will discuss how these phase regimes evolve as functions of magnetic field, temperature, and Gd-substitution, and will compare the results with less disordered systems such as EuB₆.

Original language	English (US)
Pages (from-to)	3364-3367
Number of pages	4
Journal	International Journal of Modern Physics B
Volume	16
Issue number	20-22
DOIs	https://doi.org/10.1142/s0217979202014425
State	Published - Aug 30 2002

ASJC Scopus subject areas

Statistical and Nonlinear Physics
Condensed Matter Physics

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abstract = "We use Raman scattering to investigate magnetic polarons and spin-career interaction effects in the (Eu, Gd)O system. Raman scattering studies reveal great richness in the phase behavior of this system: a spin-fluctuation-dominated paramagnetic (PM) phase regime for T > T* > Tc, a two-phase regime for T < T* in which magnetic polarons develop below T* and coexist with a remnant of the PM phase, and an inhomogeneous ferromagnetic phase regime for T < Tc. We will discuss how these phase regimes evolve as functions of magnetic field, temperature, and Gd-substitution, and will compare the results with less disordered systems such as EuB6.",

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AU - Rho, H.

AU - Snow, C. S.

AU - Cooper, S. L.

AU - Fisk, Z.

AU - Comment, A.

AU - Ansermet, J. P.H.

PY - 2002/8/30

Y1 - 2002/8/30

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AB - We use Raman scattering to investigate magnetic polarons and spin-career interaction effects in the (Eu, Gd)O system. Raman scattering studies reveal great richness in the phase behavior of this system: a spin-fluctuation-dominated paramagnetic (PM) phase regime for T > T* > Tc, a two-phase regime for T < T* in which magnetic polarons develop below T* and coexist with a remnant of the PM phase, and an inhomogeneous ferromagnetic phase regime for T < Tc. We will discuss how these phase regimes evolve as functions of magnetic field, temperature, and Gd-substitution, and will compare the results with less disordered systems such as EuB6.

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Raman scattering study of temperature- and field-dependent magnetic polaron formation in (Eu,Gd)O

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