(Color online) (a) Elastic moduli c44 and c11 vs temperature for the parent compound Tb6FeBi2; (b) c44 vs temperature for Tb6Fe1−xCoxBi2, as indicated.
(Color online) c44 vs temperature at various fields for polycrystalline samples of (a) Tb6FeBi2 and (b) Tb6Fe0.75Co0.25Bi2.
(Color online) Magnetostriction λ|| vs magnetic field for Tb6Fe1−xCoxBi2. (a) Tb6FeBi2 and Tb6Fe0.75Co0.25Bi2 at T > 100 K. (b) Tb6FeBi2, (c) Tb6Fe0.875Co0.125Bi2, and (d) Tb6Fe0.75Co0.25Bi2, all at T ≤ 100 K.
(Color online) λ|| at 20 kOe vs temperature for Tb6FeBi2, Tb6Fe0.875Co0.125Bi2, and Tb6Fe0.75Co0.25Bi2. Inset: Magnetoelastic coupling vs temperature for Tb6FeBi2 and Tb6Fe0.75Co0.25Bi2.
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