Antiferromagnetic ordering in the expanded (NH3)Rb3C60 fulleride

J. Arvanitidis; K. Papagelis; T. Takenobu; I. Margiolaki; K. Brigatti; K. Prassides; Y. Iwasa; A. Lappas

doi:10.1016/S0921-4526(02)01661-7

Antiferromagnetic ordering in the expanded (NH₃)Rb₃C₆₀ fulleride

J. Arvanitidis^*, K. Papagelis, T. Takenobu, I. Margiolaki, K. Brigatti, K. Prassides, Y. Iwasa, A. Lappas

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

The magnetic behavior of the ammoniated alkali fulleride (NH₃)Rb₃C₆₀ is studied by means of μ⁺ spin relaxation (μ⁺SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field μ⁺SR spectra reveals that its ground state is that of an ordered antiferromagnet, characterized by large spatially inhomogeneous effects. The temperature dependence of the μ⁺ spin precession frequency is consistent with that of a conventional 3D Heisenberg antiferromagnet (T_N ∼ 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.

Original language	English
Pages (from-to)	572-576
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	326
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4526(02)01661-7
Publication status	Published - 2003 Feb
Externally published	Yes

Keywords

Ammoniated alkali fullerides
Antiferromagnetic ordering

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/S0921-4526(02)01661-7

Cite this

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title = "Antiferromagnetic ordering in the expanded (NH3)Rb3C60 fulleride",

abstract = "The magnetic behavior of the ammoniated alkali fulleride (NH3)Rb3C60 is studied by means of μ+ spin relaxation (μ+SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field μ+SR spectra reveals that its ground state is that of an ordered antiferromagnet, characterized by large spatially inhomogeneous effects. The temperature dependence of the μ+ spin precession frequency is consistent with that of a conventional 3D Heisenberg antiferromagnet (TN ∼ 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.",

keywords = "Ammoniated alkali fullerides, Antiferromagnetic ordering",

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language = "English",

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T1 - Antiferromagnetic ordering in the expanded (NH3)Rb3C60 fulleride

AU - Arvanitidis, J.

AU - Papagelis, K.

AU - Takenobu, T.

AU - Margiolaki, I.

AU - Brigatti, K.

AU - Prassides, K.

AU - Iwasa, Y.

AU - Lappas, A.

PY - 2003/2

Y1 - 2003/2

N2 - The magnetic behavior of the ammoniated alkali fulleride (NH3)Rb3C60 is studied by means of μ+ spin relaxation (μ+SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field μ+SR spectra reveals that its ground state is that of an ordered antiferromagnet, characterized by large spatially inhomogeneous effects. The temperature dependence of the μ+ spin precession frequency is consistent with that of a conventional 3D Heisenberg antiferromagnet (TN ∼ 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.

AB - The magnetic behavior of the ammoniated alkali fulleride (NH3)Rb3C60 is studied by means of μ+ spin relaxation (μ+SR) spectroscopy. The observation of a strongly damped oscillating component in the low-temperature zero-field μ+SR spectra reveals that its ground state is that of an ordered antiferromagnet, characterized by large spatially inhomogeneous effects. The temperature dependence of the μ+ spin precession frequency is consistent with that of a conventional 3D Heisenberg antiferromagnet (TN ∼ 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.

KW - Ammoniated alkali fullerides

KW - Antiferromagnetic ordering

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