Accession Number : AD0439406


Title :   LOW-TEMPERATURE MAGNETIC SUSCEPTIBILITIES OF THE HYDRATED NICKEL NITRATES,


Corporate Author : CARNEGIE INST OF TECH PITTSBURGH PA


Personal Author(s) : Berger,L ; Friedberg,S A


Report Date : 15 Mar 1964


Pagination or Media Count : 1


Abstract : The zero-field magnetic susceptibilities of Ni(NO3)22H20, Ni(n03)24H20, and Ni(NO3)26H20 have been measured in the liquid hydrogen and liquid helium ranges. The dihydrate is obtained by evaporation of a solution at 105C. Its powder susceptibility has a large, sharp, peak at 4.20K, where it reaches 0.74 CGS/mole, then drops down to 0.2 CGS/mole below 2K. When measured along the a-axis, the susceptibility of monoclinic single crystals of the dihydrate shows a similar peak. It reaches 1.5 CGS/mole, but drops to vanishing values at lower temperatures. The susceptibility in the bc plane reaches only 0.3 CGS/mole, and is nearly isotropic. It crops little below 4.20 K. This behavior is similar to that of FeC12, or FeC03, and suggests the existence of two magnetic sublattices, with strong ferromagnetic interactions within each sublattice, and weaker antiferromagnetic interactions between one sublattice and the other (metamagnetism). (Author)


Descriptors :   *PERMEABILITY(MAGNETIC) , NICKEL COMPOUNDS , NITRATES , HYDRATES , LOW TEMPERATURE , FERROMAGNETIC MATERIALS , TEMPERATURE , ATOMIC STRUCTURE , X RAY DIFFRACTION , SOLUTIONS(MIXTURES) , EVAPORATION , SYMMETRY , MAGNETIC PROPERTIES , SINGLE CRYSTALS , POWDERS , CHEMICAL ANALYSIS


Distribution Statement : APPROVED FOR PUBLIC RELEASE