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Abstract: A ribbon of a Mn-Bi meta-stable phase was fabricated by melt-spinning a Bi-rich Mn-Bi alloy (Mn10Bi90). Employing magnetic field heating to an as-spun sample up to 530K in a magnetic field of 10kOe results in a highly c-axis preferred orientation, showing the remanence magnetization ratio M r/M s ≈1.0 on the demagnetization curve for the heat-treated sample. The magnetic field heating also produces the c-axis preferred orientation in an ex situ annealed sample composed of MnBi particles with a random c-axis orientation. Investigating magnetization change upon changing the heating temperature suggests that MnBi particle rotation at an optimized heating temperature plays an important role in aligning the c-axis along the applied field. [Copyright &y& Elsevier]