- Effect of annealing on the magnetic and superconducting properties of single-crystalline UCoGe
- Journal of Magnetism and Magnetic Materials
- Volume | Issue number
- 321 | 17
- Pages (from-to)
- Document type
- Faculty of Science (FNWI)
- Van der Waals-Zeeman Institute (WZI)
Single-crystals of the new ferromagnetic superconductor UCoGe have been grown. The quality of as-grown samples can be significantly improved by a heat-treatment procedure, which increases the residual resistance ratio (RRR) from similar to 5 to similar to 30. Magnetization M(T) and resistivity r(T) measurements show the annealed samples have a sharp ferromagnetic transition with a Curie temperature T-C is 2.8 K. The ordered moment of 0.06 mu(B) is directed along the orthorhombic c-axis. Superconductivity is found below a resistive transition temperature T-s = 0.65 K.
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