Conclusions
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1.
The λ isotherms have been studied 500 and 800 deg k, the region of the ɛ→ γ transition. The λ isotherms near T for (ɛ → γ) are similar to those for Fe, but near T for the reverse transition they resemble those for cast Co [1], suggesting that this is a heterogeneous mixture of the two phases.
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2.
The hysteresis cycle for λs(T) due to the ɛ ⇄ γ transitions shows that the transitions occur at ∼ 657 and 743 deg K.
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Zubov, V.V. Temperature dependence of magnetostriction in cobalt near the ɛ⇄γ phase transition. Soviet Physics Journal 8, 76–77 (1965). https://doi.org/10.1007/BF00823747
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DOI: https://doi.org/10.1007/BF00823747