Mostafa, M.F., S. A. M. A. M. A.,
"Field dependence of the susceptibility maximum for two-dimensional antiferromagnet",
Physics Letters A, vol. 61, no. 3, pp. 183-184, 1977.
AbstractThe magnetic susceptibility measurements on layered type structure (CH3NH3)2FeCl2Br2 revealed a transition temperature TN(H = 0) ≈ 100 K. The transition temperature of (CH3NH3)2FeCl4 was previously found to be TN(H = 0) ≈ 95 K. The effect of magnetic field on the transition temperature and peak intensity for both compounds has been investigated. © 1977.
El Gaby, S., and M. M. El Aref,
"Geological, Petrochemical and Geochemical Studies on The Shaitan Granite at Wadi Shait, Eastern Desert, Egypt. ",
Bull. Fac. Sc., Assiut University, vol. 6, pp. 307-329, 1977.
El Gaby, S., and M. M. El Aref,
"Geological, Petrochemical and Geochemical Studies on The Shaitan Granite at Wadi Shait, Eastern Desert, Egypt. ",
Bull. Fac. Sc., Assiut University, vol. 6, pp. 307-329, 1977.
Mashaly, M. M., and B. C. Wentworth,
"HALF-LIFE OF PLASMA PROGESTERONE IN TURKEY LAYERS AND NON-LAYERS",
POULTRY SCIENCE, vol. 56, issue 5: POULTRY SCIENCE ASSOC INC 1111 NORTH DUNLAP AVE, SAVOY, IL 61874, pp. 1734-1734, 1977.
Abstractn/a
Mostafa, M.F., S. A. M. M. A.,
"High-temperature susceptibility of copper compounds containing CuCl2- 4 or Cu2Cl2- 6 ions",
Physica B+C, vol. 86-88, no. PART 2, pp. 691-692, 1977.
AbstractWe have measured the magnetic susceptibility of [(C2H5)2NH2]2 CuCl4, (iso-C3H7NH3)2CuCl4, and (iso-C3H7NH3)CuCl3 in the temperature range 80 < T < 400 K. These compounds show thermochrimic first order phase transitions at 315.5, 329.5 and 324.5 K, respectively, which is related to the change in geometry of the chlorine coordination of Cu2+. From the susceptibility data, estimates of the super-exchange interaction can be inferred. For [(C2H5)2NH2]2CuCl4 and (iso-C3H7NH3)2CuCl4 our results evidenced the presence of ferromagnetic interactions between the Cu ions within the network formed by CuCl2- 4 ions. For the (iso-C3H7NH3)CuCl3 the interaction between two Cu2+ ions forming the dimer can be estimated. The interaction between the dimers is found to be much weaker. © 1977.