Physics and Astronomy, Ames Laboratory
Journal or Book Title
Physical Review B
Substantial amounts of the transition metals Mn, Fe, Co, and Ni can be substituted for Li in single crystalline Li2(Li1−xTx)N. Isothermal and temperature-dependent magnetization measurements reveal local magnetic moments with magnitudes significantly exceeding the spin-only value. The additional contributions stem from unquenched orbital moments that lead to rare-earth-like behavior of the magnetic properties. Accordingly, extremely large magnetic anisotropies have been found. Most notably, the magnetic anisotropy alternates as easy plane→easy axis→easy plane→easy axis when progressing from T=Mn→Fe→Co→Ni. This behavior can be understood based on a perturbation approach in an analytical, single-ion model. The calculated magnetic anisotropies show surprisingly good agreement with the experiment and capture the basic features observed for the different transition metals.
American Physical Society
Jesche, A.; Ke, L.; Jacobs, J. L.; Harmon, B.; Houk, R. S.; and Canfield, Paul C., "Alternating magnetic anisotropy of Li2 (Li1–xTx) N (T= Mn, Fe, Co, and Ni)" (2015). Physics and Astronomy Publications. 598.