SPIN DYNAMICS ON 2-DIMENSIONAL HEISENBERG ANTIFERROMAGNETS - HIGH-ENERGY NEUTRON INELASTIC-SCATTERING FROM LA2CUO4 AND LA2NIO4

被引：19

作者：

ITOH, S

YAMADA, K

ARAI, M

ENDOH, Y

HIDAKA, Y

HOSOYA, S

机构：

[1] NIPPON TELEGRAPH & TEL PUBL CORP, ADV TECHNOL LAB, TOKAI, IBARAKI 31911, JAPAN

[2] NATL LAB HIGH ENERGY PHYS, BOOSTER SYNCHROTRON UTILIZAT FACIL, TSUKUBA, IBARAKI 305, JAPAN

[3] TOHOKU UNIV, DEPT PHYS, AOBA KU, SENDAI, MIYAGI 980, JAPAN

[4] KOBE UNIV, DEPT PHYS, NADA KU, KOBE 657, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 12期

关键词：

NEUTRON SCATTERING; PULSED NEUTRON; SPIN WAVE; 2-DIMENSIONAL HEISENBERG ANTIFERROMAGNETISM;

D O I：

10.1143/JPSJ.63.4542

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Inelastic neutron scattering experiments were performed using a chopper spectrometer, MARI, to elucidate the spin dynamics of two-dimensional quantum Heisenberg antiferromagnets of both La(2)uO(4) (S=1/2) and La2NiO4 (S=1) over a wide range of both momentum and energy transfers. The spin dynamics at low temperatures well below the Neel temperature was confirmed to essentially follow two-dimensional spin-wave theory. A quantitative analysis based on spin-wave theory showed that the magnetic form factor determined from the spin excitation is well described by the calculated free-ion magnetic form factor.

引用

页码：4542 / 4549

页数：8

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