Magnetic Properties of Some Orthoferrites and Cyanides at Low Temperatures

摘要: The magnetization of some rare-earth orthoferrites and related compounds, iron-group cyanides, has been investigated at temperatures between room temperature 1.3\ifmmode^\circ\else\textdegree\fi{}K. Some are ferromagnetic, antiferromagnetic, paramagnetic following the Curie-Weiss law.The compounds GdV${\mathrm{O}}_{3}$, GdFe${\mathrm{O}}_{3}$, ErFe${\mathrm{O}}_{3}$ apparently antiferromagnetic with N\'eel points 7.5\ifmmode^\circ\else\textdegree\fi{}, 2.5\ifmmode^\circ\else\textdegree\fi{}, 4.5\ifmmode^\circ\else\textdegree\fi{}K, respectively. Ordering Gd Er ions low is indicated. NdFe${\mathrm{O}}_{3}$, SmFe${\mathrm{O}}_{3}$, YFe${\mathrm{O}}_{3}$, NdV${\mathrm{O}}_{3}$, PrV${\mathrm{O}}_{3}$, SmV${\mathrm{O}}_{3}$ show a rapid rise in ferromagnetic moment as lowered below about 15\ifmmode^\circ\else\textdegree\fi{}K. GdTi${\mathrm{O}}_{3}$ 0.54 Bohr magneton per molecule.Many cyanides type $A(B{\mathrm{C}}_{6}{\mathrm{N}}_{6})$ magnetic moments 1 to 4 magnetons molecule Curie 3 50\ifmmode^\circ\else\textdegree\fi{}K.A null method measurement used. Movement pendulum field gradient detected strain gauges balanced coil. In space containing specimen balancing coil varies linearly distance.