Anomalous spin-density distribution on oxygen and Ru in Ca1.5Sr0.5RuO4:: Polarized neutron diffraction study -: art. no. 087202

被引：34

作者：

Gukasov, A ^{[1
]}

Braden, M

Papoular, RJ

Nakatsuji, S

Maeno, Y

机构：

[1] Ctr Etud Saclay, CNRS, CEA, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France

[2] Forschungszentrum Karlsruhe, IFP, D-70621 Karlsruhe, Germany

[3] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[5] Natl High Magnet Field Lab, Tallahassee, FL 32310 USA

[6] Kyoto Univ, Int Innovat Ctr, Kyoto 6068501, Japan

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.89.087202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By means of polarized neutron diffraction in a magnetic field of 7.0 T at 1.6 K an anomalously large magnetization density is observed on the in-plane oxygen in Ca1.5Sr0.5RuO4. Field-induced moments of different ions are determined by refinement on the flipping ratios, yielding mu(Ru)=0.346(11)mu(B), mu(O1)=0.076(6)mu(B), and mu(O2)=0.009(6)mu(B). The moment on the oxygen arises from the strong hybridization between the Ru-4d and O-2p orbitals. The maximum entropy magnetization density reconstruction reveals a strongly anisotropic density at the Ru site, consistent with the distribution of the xy (t(2g) band) d orbitals.

引用

页码：087202/1 / 087202/4

页数：4

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