Fermi Surface Measurements on the Low Carrier Density Ferromagnet Ca1-xLaxB6 and SrB6

2); (2) Louisiana State University; 3); (3) National Center for Physical Acoustics); A. Teklu (2; Donavan Hall (1); D. P. Young (1; E. C. Palm (1); R. G. Goodrich (2) ((1)National High Magnetic Field Laboratory; T. P. Murphy (1)

arxiv: cond-mat/0104184 · v1 · submitted 2001-04-10 · ❄️ cond-mat

Fermi Surface Measurements on the Low Carrier Density Ferromagnet Ca1-xLaxB6 and SrB6

Donavan Hall (1) , D. P. Young (1 , 2) , Z. Fisk (1) , T. P. Murphy (1) , E. C. Palm (1) , A. Teklu (2 , 3)

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R. G. Goodrich (2) ((1)National High Magnetic Field Laboratory (2) Louisiana State University (3) National Center for Physical Acoustics)

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classification ❄️ cond-mat

keywords fermitemperaturedensityelectronresultssurfacealphenapproximately

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Recently it has been discovered that weak ferromagnetism of a dilute 3D electron gas develops on the energy scale of the Fermi temperature in some of the hexaborides; that is, the Curie temperature approximately equals the Fermi temperature. We report the results of de Haas-van Alphen experiments on two concentrations of La-doped CaB6 as well as Ca-deficient Ca1-dB6 and Sr-deficient Sr1-dB6. The results show that a Fermi surface exists in each case and that there are significant electron-electron interactions in the low density electron gas.

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Fermi Surface Measurements on the Low Carrier Density Ferromagnet Ca1-xLaxB6 and SrB6

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