Antiferromagnetic ordering in the expanded (NH3)Rb3C60 fulleride

被引：5

作者：

Arvanitidis, J ^{[1
]}

Papagelis, K

Takenobu, T

Margiolaki, I

Brigatti, K

Prassides, K

Iwasa, Y

Lappas, A

机构：

[1] Univ Sussex, Sch Chem Phys & Environm Sci, Brighton BN1 9QJ, E Sussex, England

[2] Tohoku Univ, Mat Res Inst, Aoba Ku, Sendai, Miyagi 9808577, Japan

[3] Japan Sci & Technol Corp, CREST, Kawaguchi 3320012, Japan

[4] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Iraklion 71110, Greece

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 326卷 / 1-4期

关键词：

ammoniated alkali fullerides; antiferromagnetic ordering;

D O I：

10.1016/S0921-4526(02)01661-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The magnetic behavior of the ammoniated alkali fulleride (NH3)Rb3C60 is studied by means of mu(+) spin relaxation (mu(+) SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field p SR spectra reveals that its ground state is that of an ordered anti ferromagnet. characterized by large spatially inhomogeneous effects. The temperature dependence of the mu(+) spin precession frequency is consistent with that of a ;conventional 3D Heisenberg antiferromagnet (T-N similar to 51 K). The cooling rate of the sample affects sensitively the ordering of the magnetic moments, a behavior that can be attributed to the influence of the orientational order of the fullerene units on the exchange interactions. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：572 / 576

页数：5

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