Phenomenological theory of the spin-density-wave state of chromium

A phenomenological theory of the spin-density-wave (SDW) state of chromium is constructed and used to discuss and correlate, at temperatures close to the N\'eel temperature, a number of properties including the direction and the stress dependence of the SDW wave vector; the polarization (helical or linear) of the SDW and its stress dependence; the anomalies in the specific heat, thermal-expansion coefficients, and elastic constants; stress-cooling and stress-polarization experiments; and the harmonics of the fundamental SDW.