| 释义 |
Van Vleck paramagnetism Van Vleck paramagnetism[van ′vlek ¦par·ə′mag·nə‚tiz·əm] (quantum mechanics) The paramagnetism of a collection of atoms, ions, or molecules, as computed by quantum theory; the atoms, ions, or molecules in a magnetic field are distributed among the various allowed energy levels according to a Boltzmann distribution, and the magnetization of the system is computed by finding the average component of angular momentum parallel to the field. |