New magnetic materials obtained by ion-exchange reactions from non-magnetic layered perovskites

被引：17

作者：

Kageyama, H ^{[1
]}

Viciu, L

Caruntu, G

Ueda, Y

Wiley, JB

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan

[2] Univ New Orleans, Dept Chem, New Orleans, LA 70148 USA

[3] Univ New Orleans, Adv Mat Res Inst, New Orleans, LA 70148 USA

[4] Univ New Orleans, New Orleans, LA 70148 USA

[5] Univ Tokyo, Inst Solid State Phys, Kashiwa, Chiba 2778581, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 11期

关键词：

D O I：

10.1088/0953-8984/16/11/003

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

New layered magnetic materials, (MCl)Ca2Ta3O10 (M = Cu, Fe), have been prepared by ion-exchange reactions of non-magnetic perovskite derivatives, ACa(2)Ta(3)O(10) (A = Rb, Li), in corresponding anhydrous molten salts. Powder x-ray diffraction patterns of the products are successfully indexed assuming tetragonal symmetry with cell dimensions a = 3.829 Angstrom and c = 15.533 Angstrom for Cu, and a = 3.822 Angstrom and c = 15.672 Angstrom for Fe. Being separated by the Ca2Ta3O10 triple-layer perovskite slabs, the transition-metal chloride (MCl) network provides a two-dimensional magnetic lattice. Magnetic susceptibility measurements show that (CuCl)Ca2Ta3O10 is in an antiferromagnetic state below 8 K, while (FeCl)Ca2Ta3O10 has two anomalies at 91 and 125 K, suggesting successive phase transitions due to geometrical spin frustration.

引用

页码：S585 / S590

页数：6

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