MAGNETIC PHASE-TRANSITION IN AGCRO2

被引：47

作者：

OOHARA, Y

MITSUDA, S

YOSHIZAWA, H

YAGUCHI, N

KURIYAMA, H

ASANO, T

MEKATA, M

机构：

[1] SCI UNIV TOKYO, FAC SCI, DEPT PHYS, SHINJUKU KU, TOKYO 162, JAPAN

[2] FUKUI UNIV, FAC ENGN, DEPT APPL PHYS, BUNKYO KU, FUKUI 910, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 03期

关键词：

AGCRO2; NEUTRON SCATTERING; RHOMBOHEDRAL ANTIFERROMAGNET; SPIN FRUSTRATION;

D O I：

10.1143/JPSJ.63.847

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic ordering of AgCrO2, a rhombohedrally stacked triangular-lattice antiferromagnet with Heisenberg spin S = 3/2, has been studied by magnetic susceptibility measurement and neutron diffraction on a powder sample. The magnetic phase transition temperature was determined to be 24 K. The magnetic peaks appear at (0.327 0.327 0) in hexagonal units, which shows that the magnetic structure is a modulated 120-degrees structure. The modulation is due to the competition between the intraplane and interplane interactions. The magnetic peaks are broad, indicating that this strong competition suppresses the development of the true long-range order in AgCrO2 below 24 K.

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页码：847 / 850

页数：4

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