The Magnetic Susceptibility of Manganese Pyrophosphate as a Function of Temperature

The Magnetic Susceptibility of manganese pyrophosphate has been measured as a function of temperature from 300 to 1165 °K. The Curie and Weiss constants for the substance have been found to be 4.57 and -14 ° respectively. The Curie constant is larger than the value predicted from theoretical considerations

Low Temperature Neutron Diffraction Study of MnTe

Investigation of transport and magnetic properties of MnTe at low temperatures sInvestigation of transport and magnetic properties of MnTe at low temperatures showed anomalies like negative coefficient of resistance below 100K and a sharp rise in susceptibility at around 83K similar to a ferromagnetic transition. Low temperature powder neutron diffraction experiments were therefore carried out to understand the underlying phenomena responsible for such anomalous behavior. Our study indicates that the rise in susceptibility at low temperatures is due to strengthening of ferromagnetic interaction within the plane over the inter plane antiferromagnetic interactions.Comment: Appearing in J. Magn. Magn. Mate

An investigation of the electrical conductivity of nickel and manganese oxides as a function of temperature and oxygen content

On the basis of their electrical conductivities solids may be divided into three classes: metals, insulators, and semiconductors. Metals at room temperature have a high electronic conductivity which decreases with increasing temperature, while insulators have an extremely low ionic conductivity which increases rapidly with temperature. Semiconductors, like metals, conduct electronically, but their resistance at room temperature is much higher than that of metals and has a negative temperature coefficient. A solid may be a member of more than one class. For example, it is believed that if most semiconductors were prepared in an extremely pure state, they would behave as insulators. On the other hand, insulators to which some excess cation or anion has been introduced exhibit both electronic and electrolytic conductivities in some cases. However, there is evidence to indicate that a few solids have a true "intrinsic" semiconduction which is independent of their impurity content

The Magnetic Susceptibility of Manganese Pyrophosphate as a Function of Temperature

The Magnetic Susceptibility of manganese pyrophosphate has been measured as a function of temperature from 300 to 1165 °K. The Curie and Weiss constants for the substance have been found to be 4.57 and -14 ° respectively. The Curie constant is larger than the value predicted from theoretical considerations