Far-infrared study of the two-dimensional dimer spin system SrCu2(BO3)2

被引：38

作者：

Room, T

Nagel, U

Lippmaa, E

Kageyama, H

Onizuka, K

Ueda, Y

机构：

[1] NICPB, EE-12618 Tallinn, Estonia

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.61.14342

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using far-infrared spectroscopy in magnetic fields up to 12 T we have studied a two-dimensional dimer spin gap system SrCu2(BO3)(2) We found several infrared-active modes in the dimerized state (below 10 K) in the frequency range from 3 to 100 cm(-1). The measured splitting from the ground state to the excited triplet Ms = 0 sublevel is Delta(1) = 24.2 cm(-1) and the other two triplet state sublevels in zero magnetic field are 1.4 cm(-1) below and above the M-S = O sublevel. Another multiplet is at Delta(2) = 37.6 cm(-1) from the ground state. A strong electric dipole active transition polarized in the (ab) plane is activated in the dimer spin system below 15 K at 52 cm(-1).

引用

页码：14342 / 14345

页数：4

共 14 条

[1]

Abragam A, 1970, ELECT PARAMAGNETIC R, V1

[2] Magnetic anisotropy of SrCu2(BO3)2 with a two-dimensional orthogonal dimer lattice [J].