Showing papers on "Metamagnetism published in 1970"
TL;DR: In this paper, a new type of metamagnetism has been found in this paramagnetic state at x = 0.86 and the metamagnetic properties have been measured under a strong magnetic field up to 75 kOe and in the temperature range 4.2°K to 800°K.
Abstract: The magnetic phase diagram of Co(S x Se 1- x ) 2 , the solid solution between ferromagnetic CoS 2 and antiferromagnetic CoSe 2 , has been given by neutron diffraction experiment, where the paramagnetism at absolute zero was found in the range 0.5< x <0.88. This paramagnetic state is named “exchange-compensated paramagnetism”. A new type metamagnetism has been found in this paramagnetic state at x =0.86. This behavior had been already predicted theoretically by M. Hattori, K. Adachi and H. Nakano in J. Phys. Soc. Japan 26 (1969) 642. The metamagnetic properties have been measured under a strong magnetic field up to 75 kOe and in the temperature range 4.2°K to 800°K. The metamagnetism shows the hysteresis without remanence below 34°K and the saturation moment agrees with that of CoS 2 . The obtained results have been analyzed from the thermostatistical standpoint with an analogy of the condensation of imperfect gas and the critical indices have been determined. The origin of the exchange-compensated paramag...
40 citations
TL;DR: In this paper, the magnetic properties of the rare earth alloys RAl, RNi, and R3Ni were studied in high magnetic fields up to 70 kOe.
Abstract: We have studied the magnetic properties of the rare‐earth alloys RAl, RNi, and R3Ni, with R = Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, in high magnetic fields up to 70 kOe. For the three series, the magnetic properties differ according to the alloyed rare earth. The compounds RAl of DyAl type and RNi of FeB type are ferromagnetic or antiferromagnetic. The compounds R3Ni exhibit metamagnetism, except Tm3Ni which has a ferromagnetic behavior. We have studied the magnetic structure of NdAl, TbAl, HoAl, ErAl, TmAl, NdNi, ErNi, HoNi, and Er3Ni by neutron diffraction. They have all a noncolinear magnetic structure except NdNi, in which the magnetic moments are parallel. We have studied the stability of the magnetic structures by means of group theory; they are all stabilized by strongly anisotropic magnetic interactions between rare‐earth atoms.
37 citations
TL;DR: In this paper, magnetization isotherms have been measured for single crystal Ni(NO3)2.2H2O between 1.4 degrees and 4.2 degrees K with fields up to 16 k Oe applied along the a-axis.
Abstract: Abstract : Magnetization isotherms have been measured for single crystal Ni(NO3)2.2H2O between 1.4 degrees and 4.2 degrees K with fields up to 16 k Oe applied along the a-axis. These isotherms exhibit the metamagnetic threshold phenomenon anticipated on the basis of earlier zero-field susceptibility measurements. The locus of the metamagnetic transition points in the H,T plane forms a smooth phase boundary separating antiferromagnetic and ferro- or paramagnetic regions. (Author)
33 citations