Inverse Magneto-Caloric Effect at the Spin Reorientation of Fe₂B Alloys Doped with Co

The magneto-caloric effect is usually quantified by a negative variation of entropy when applying field at constant temperature. An inverse effect can also be observed near spin reorientations. We describe the solution growth method used for the synthesis of single crystals of Fe₂B alloys with Co substitutions. We can control the spin reorientation temperature using Co doping. The transition occurs in the range 300-0 K for substitutions in the range 11-13%. We report on an inverse magneto-caloric effect at this transition.