Néel temperature
Encyclopedia
The Néel temperature or magnetic ordering temperature , TN, is the temperature
above which an antiferromagnetic material becomes paramagnetic—that is, the thermal energy becomes large enough to destroy the macroscopic magnetic ordering within the material.
The Néel temperature is analogous to the Curie temperature, TC, for ferromagnetic materials. It is named after Louis Néel (1904–2000), who received the 1970 Nobel prize
in physics
for his work in the area.
Listed below are the Néel temperatures of several materials:
Temperature
Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot...
above which an antiferromagnetic material becomes paramagnetic—that is, the thermal energy becomes large enough to destroy the macroscopic magnetic ordering within the material.
The Néel temperature is analogous to the Curie temperature, TC, for ferromagnetic materials. It is named after Louis Néel (1904–2000), who received the 1970 Nobel prize
Nobel Prize
The Nobel Prizes are annual international awards bestowed by Scandinavian committees in recognition of cultural and scientific advances. The will of the Swedish chemist Alfred Nobel, the inventor of dynamite, established the prizes in 1895...
in physics
Physics
Physics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
for his work in the area.
Listed below are the Néel temperatures of several materials:
| substance | Néel temperature, in Kelvin Kelvin The kelvin is a unit of measurement for temperature. It is one of the seven base units in the International System of Units and is assigned the unit symbol K. The Kelvin scale is an absolute, thermodynamic temperature scale using as its null point absolute zero, the temperature at which all... |
|---|---|
| MnO | 116 |
| MnS | 160 |
| MnTe | 307 |
| MnF2 | 67 |
| FeF2 | 79 |
| FeCl2 | 24 |
| FeO | 198 |
| CoCl2 | 25 |
| CoO | 291 |
| NiCl2 | 50 |
| NiO | 525 |
| Cr | 308 |