Susceptibility, hysteresis and magnetization states in the CuMn spin glass

• Published in: Journal of magnetism and magnetic materials 1983-01, Vol.38 (2), p.123-132
• Main Authors: Retat, I., Schwink, Ch
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Magnetic properties and materials; Materials science; Metals, semimetals and alloys; Other topics in magnetic properties and materials; Physics; Specific materials
• ISSN: 0304-8853
• DOI: 10.1016/0304-8853(83)90036-7

AC susceptibilities have been measured at T ⪡ T f on a quenched Cu-8.25 at% Mn sample along the hysteresis curve and especially in remanent magnetization states. Along the M( H)-curve ϰ∥ starts to decrease already below the S-point field H w, when d M/d M is still increasing. After reduction of the external field from H ⪢ H w to zero ϰ ⊥ by far exceeds ϰ ∥, which itself is a little increased above its starting (ZFC) value. Reversing the external field ϰ ∥ develops distinct maxima at the step fields H st. A model is developed considering the spin glass at M r to consist of magnetic moments bound by different anisotropies to preferential directions which are oriented partly at random (anisotropy field H ∗ w), partly along M r (anisotropy field H H ∗ st ⪡ H ∗ w). The model connects both susceptibilities with characteristic parameters of the hysteresis and quantitatively explains the data.