Magnetic properties of pure and Gd doped EuO probed by NMR

Abstract

An Eu NMR study in the ferromagnetic phase of pure and Gd doped EuO was performed. A complete description of the NMR lineshape of pure EuO allowed for the influence of doping EuO with Gd impurities to be highlighted. The presence of a temperature dependent static magnetic inhomogeneity in Gd doped EuO was demonstrated by studying the temperature dependence of the lineshapes. The results suggest that the inhomogeneity in 0.6% Gd doped EuO is linked to colossal magnetoresistance. The measurement of the spin-lattice relaxation times as a function of temperature led to the determination of the value of the exchange integral J as a function of Gd doping. It was found that J is temperature independent and spatially homogeneous for all the samples and that its value increases abruptly with increasing Gd doping.

arXiv comment14 pages, 10 figures, to be published in Physical Review B

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Cited by in corpus (5)

• Exchange interactions in europium monochalcogenide magnetic semiconductors and their dependence on hydrostatic strain
• Electronic inhomogeneity in EuO: Possibility of magnetic polaron states
• The phase transition in the localized ferromagnet EuO probed by muSR
• NMR Measurements of Power-Law Behavior in the Spin-Wave and Critical Regions of Ferromagnetic EuO
• Spiral spin liquid resilient to quantization in the frustrated honeycomb antiferromagnet GdZnPO