Title :
Magnetovolume effects on the GdNi1-xCux compounds with low magnetocrystalline anisotropy
Author :
Espeso, J.I. ; Fernandez, J.R. ; Sal, J. C G6mez ; Blanco, J.A.
Author_Institution :
Fac. de Ciencias, Cantabria Univ., Santander, Spain
fDate :
3/1/1994 12:00:00 AM
Abstract :
Thermal expansion of GdNi1-xCux (x=0, 0.3 and 0.6) and the non magnetic LaNi and YNi strain gauge technique. Although changes in the crystalline and magnetic structures occur for x⩾0.25 and x⩾0.35 respectively, all the compounds show positive spontaneous volume magnetostriction. Combining thermal expansion and specific heat measurements we extract the pressure derivative of the ordering temperature. The relation between the magnetic thermal expansion coefficients and the derivative of the magnetic electrical resistivity is analysed, revealing different behaviours for the ferromagnetic and antiferromagnetic compounds
Keywords :
antiferromagnetic properties of substances; copper alloys; gadolinium alloys; magnetic anisotropy; magnetic structure; magnetomechanical effects; magnetoresistance; magnetostriction; nickel alloys; specific heat of solids; thermal expansion; GdNi1-xCux; GdNiCu; antiferromagnetic; ferromagnetic; low magnetocrystalline anisotropy; magnetic electrical resistivity; magnetic structures; magnetic thermal expansion coefficients; magnetovolume effects; ordering temperature; positive spontaneous volume magnetostriction; specific heat measurements; thermal expansion; Antiferromagnetic materials; Crystallization; Electric resistance; Magnetic analysis; Magnetic field induced strain; Magnetostriction; Pressure measurement; Temperature; Thermal expansion; Thermal resistance;
Journal_Title :
Magnetics, IEEE Transactions on
