TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=0037301757&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0037301757&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(02)01661-7
DO - 10.1016/S0921-4526(02)01661-7
M3 - Article
AN - SCOPUS:0037301757
VL - 326
SP - 572
EP - 576
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - 1-4
ER -