Accessibility investigation of large magnetic entropy change in CoMn1-xFexGe Academic Article uri icon

abstract

  • The influence of Fe doping for Mn in CoMn1xFexGe alloys on their structural and magnetic phase transitions was investigated. CoMn1xFexGe alloys display a first-order magneto-structural transition from a high temperature paramagnetic hexagonal Ni2In-type crystal structure to a low temperature ferromagnetic orthorhombic TiNiSi-type structure. An entropy change of SM=32.8J/kgK was measured and adiabatic temperature change of 8.0K was computed for the x=0.085 alloy under a magnetic field of 7T in the vicinity of the phase transition at 317K. With increasing Fe content, transition temperatures and magnetic entropy changes decrease. In addition to investigating the effect of replacing Mn with Fe, the accessibility of the giant measured entropy change was quantified by means of the minimum magnetic field required to start and to complete the magneto-structural phase transition.

published proceedings

  • JOURNAL OF APPLIED PHYSICS

author list (cited authors)

  • Yuce, S., Bruno, N. M., Emre, B., & Karaman, I.

citation count

  • 19

publication date

  • April 2016