Evidence for a ferromagnetic transition in Yb1-xLaxB6 (0≤x≤0.006)

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Magnetization and muon spin relaxation (μSR)in Yb1-xLaxB6 have been measured to study whether ferromagnetic moments appear as in La-doped CaB6. Magnetization processes of polycrystalline samples for 0≤x≤0.006 have revealed ferromagnetic hysteresis with a saturation moment of 1 × 10-4μB/f.u. On cooling below 150 K, an increase of the internal field up to 0.6 mT has been observed by zero-field/μSR measurements on both polycrystals and single crystals. These results indicate a ferromagnetic transition at 150 K in this system.
2002-06-19