Structural instability in new magnetic heusler compounds |
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Authors: | JC Suits |
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Institution: | IBM Research Laboratory, San Jose, CA 95193, U.S.A. |
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Abstract: | The crystal structure and magnetic properties have been determined for a new series of compounds of the form Rh2TSn. For T = Mn, Ni, or Cu, the room temperature structure is the fully ordered cubic Heusler structure. For T = V, Cr, Fe, or Co, a new structure is observed which is an exceptionally large tetragonal distortion of the Heusler structure (c/a = 1.18?1.27). The appearance of this tetragonal distortion is attributed to an electronic instability of the band Jahn-Teller type. |
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