Title :
High field magnetization of single crystalline Ho2Co17 under pressure
Author :
Kayzel, Frank E. ; Bakker, Klaas ; Franse, Jaap J M ; Radwanski, R.J.
Author_Institution :
Van der Waals Lab., Amsterdam Univ., Netherlands
fDate :
3/1/1994 12:00:00 AM
Abstract :
High-field magnetization measurements up to 38 T have been performed on a-newly-grown single-crystalline Ho2Co17 sample along the main crystallographic directions of the hexagonal cell. The magnetization curve along the easy direction (b-axis) exhibits a metamagnetic-like transition at 23.6 T whereas for the a-axis a similar transition occurs at 32.4 T. The transitions are extremely sharp-much sharper than in previously grown crystals. The transitions are understood as a moment-flip transition associated with the formation of a noncollinear magnetic structure in this ferrimagnetic compound. From the transition-field value the 3d-4f spin-exchange parameter has been derived. Magnetization under pressure up to 5 kbar has been used to determine the pressure dependence of the magnetic transition at 23.6T. The pressure dependence dBtr/dP amounts to -24 TMbar-1
Keywords :
cobalt alloys; exchange interactions (electron); ferrimagnetic properties of substances; high-pressure effects in solids; holmium alloys; magnetic structure; magnetisation; metamagnetism; 0 to 38 T; Ho2Co17; ferrimagnetic; magnetization; metamagnetic-like transition; moment-flip transition; noncollinear magnetic structure; pressure dependence; spin-exchange parameter; Atmospheric measurements; Crystalline materials; Crystallization; Helium; Magnetic field measurement; Magnetization; Performance evaluation; Pulse measurements; Solids; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
