Structure, magnetism, and spin-phonon coupling in heteroepitaxial La2CoMnO6/Al2O3(0001) films

被引：24
作者：
Meyer, Ch [1 ]
Roddatis, V [2 ]
Ksoll, P. [1 ]
Damaschke, B. [1 ]
Moshnyaga, V [1 ]
机构：
[1] Georg August Univ Gottingen, Phys Inst, Friedrich Hund Pl 1, D-37077 Gottingen, Germany
[2] Georg August Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany
来源：
PHYSICAL REVIEW B | 2018年 / 98卷 / 13期
关键词：
THIN-FILMS; RAMAN-SCATTERING; LA2COMNO6; SPECTRA; GROWTH;
D O I：
10.1103/PhysRevB.98.134433
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Double perovskite La2CoMnO6 (LCMO) thin films with the monoclinic P2(1)/n structure were grown on hexagonal c-cut sapphire substrates by metalorganic aerosol deposition technique. Epitaxial growth of LCMO(021)/Al2O3(0001) due to an almost perfect in-plane lattice matching between LCMO and Al2O3 was evidenced by x-ray diffraction and transmission electron microscopy. A high degree of rock-salt-type Co/Mn ordering was directly visualized by means of high resolution transmission electron microscopy. The B-site ordering, influenced by the film growth rate and optimized by small compressive epitaxial strain, results in perfect magnetic properties and strong spin-phonon coupling, both necessary requisites for multiferroic performance.
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页数：9
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