Orbital polarization and Jahn-Teller distortion of strained La0.5Sr0.5MnO3 thin films

作者：Wu W B; Huang D J^*; Huang C M; Hsu C H; Chang C F; Lin H J; Chen C T

来源：Journal of Magnetism and Magnetic Materials, 2007, 310(2): 813-815.

DOI：10.1016/j.jmmm.2006.10.705

• orbital ordering
• perovskite manganites
• X-ray absorption

We report spectroscopic evidence for orbital-mediated phases in strained La0.5Sr0.5MnO3 thin films by combining soft X-ray spectroscopy and synthesis of manganite thin films. Measurements of polarization-dependent soft X-ray absorption reveal that electronic states responsible for the lowest-energy excitations in C-type antiferromagnetic La0.5Sr0.5MnO3 films have an orbital symmetry of 3z(2) - r(2), while those in A-type AFM. films have an orbital symmetry of x(2)-y(2). Such orbital polarizations in strained films of manganite result from a combined effect of the Jahn-Teller distortion and the electron correlations of Mn 3d electrons.

• 出版日期2007-3
• 单位清华大学