Butterfly hysteresis loop at non-zero bias field in antiferromagnetic molecular rings: cooling by adiabatic magnetization

O. Waldmann, R. Koch, S. Schromm +3

At low temperatures, the magnetization of the molecular ferric wheel NaFe${}_6$ exhibits a step at a critical field $B_c$ due to a field-induced level-crossing. By means of high-fiel…