Comment on Magnetic Cooling of Solid He³

Authors

Jill C. Bonner, University of Rhode Island
J. F. Nagle

Document Type

Article

Date of Original Version

5-1972

Abstract

The possibility of cooling solid He³ by adiabatic magnetization is discussed using the antiferromagnetic nearest-neighbor spin-½ Heisenberg linear chain as a reference system. The lack of a phase transition is not important in this discussion since the locus of maximum cooling generally lies outside (i.e., is unrelated to) the T−H phase boundary, contrary to previous predictions using mean-field and spin-wave theories. Exact calculations on linear chains demonstrate a potentially useful degree of equilibrium cooling. The results are in qualitative agreement with earlier spin-wave arguments, although the details of the energy spectrum are more complicated than is assumed in spin-wave theory.

Citation/Publisher Attribution

Jill C. Bonner and John. F. Nagle, J. F. (1972). Comment on Magnetic Cooling of Solid He³. Phys. Rev. A, 5(5), 2293-2296. doi: 10.1103/PhysRevA.5.2293

Available at: http://dx.doi.org/10.1103/PhysRevA.5.2293