Raman Scattering from Localized Magnetic Excitations in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Ni</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math> - and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi mathvariant="normal">Fe</mi></mrow><mrow><mn>2</mn><mo>+</mo></mrow></msup></mrow></math> - Doped Mn<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">F</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math>

A. Oseroff; P. S. Pershan

doi:10.1103/PhysRevLett.21.1593

Raman Scattering from Localized Magnetic Excitations in ${Ni}^{2 +}$ - and ${Fe}^{2 +}$ - Doped Mn $F_{2}$

A. Oseroff and P. S. Pershan

Phys. Rev. Lett. 21, 1593 – Published 2 December 1968

Abstract

We have studied Raman scattering at low temperatures from Mn $F_{2}$ doped with ${Ni}^{2 +}$ and ${Fe}^{2 +}$ . Three temperature- and polarization-dependent lines have been observed for each impurity. For each dopant we have identified one line as a two-magon excitation of the impurity and some linear combination of the host spins. When corrections are made for magnon-magnon interactions, the predicted energy is in excellent agreement with the experimental results.