Tb-Fe-B alloys have been melt spun and data obtained for the room temperature magnetisation and magnetostriction as functions of applied field and composition. Small additions of La (w 5 at. %) leave the magnetisation unchanged but substantially reduce the magnetostriction. Results are compared with sputtered binary metallic Tb/Fe alloys.

We have investigated the high field magnetisation of the frustrated one dimensional compound LiCuVO4. In zero field, LiCuVO4 undergoes long range antiferromagnetic order at TN ≈ 2.5 K with a broad short range Schottky type anomaly due to one dimensional correlations in the specific heat at 32 K. Application of a magnetic field induces a rich phase diagram. An anomaly in the derivative of the ma...

Magnetic recording using circularly polarised femto-second laser pulses is an emerging technology that would allow write speeds much faster than existing field driven methods. However, the mechanism that drives the magnetisation switching in ferromagnets is unclear. Recent theories suggest that the interaction of the light with the magnetised media induces an opto-magnetic field within the medi...

We report new experimental results obtained on the insulating spin glass CdCr1.7In0.3S4. Our experimental setup allows a quantitative comparison between the thermo-remanent magnetisation and the autocorrelation of spontaneous fluctuations of magnetisation, yielding a complete determination of the fluctuation-dissipation relation. The dynamics can be studied both in the quasi-equilibrium regime,...