Relaxation of muon spins in molecular nanomagnets
Physical Review B - Condensed Matter and Materials Physics 81:14 (2010)
Abstract:
We address the cause of the unusual muon spin-relaxation (μ+ SR) results on molecular nanomagnets (MNMs). Through measurements on protonated and deuterated samples of the MNMs Cr7 Mn (S=1) and Cr8 (S=0), we show that the muon spin for S≠0 MNMs is relaxed via dynamic fluctuations of the electronic spins. A freezing out of dynamic processes occurs on cooling and at low temperatures the muon spins are relaxed by the electronic spins which themselves are dephased by incoherent nuclear-field fluctuations. We observe a transition to a state of static magnetic order of the MNM electronic spins in Cr7Mn below 2 K. © 2010 The American Physical Society.The statistical mechanics of community assembly and species distribution
(2010)
Phase transition in the localized ferromagnet EuO probed by μsR
Physical Review B - Condensed Matter and Materials Physics 81:9 (2010)
Abstract:
We report results of muon-spin-rotation measurements performed on the ferromagnetic semiconductor EuO, which is one of the best approximations to a localized ferromagnet. We argue that implanted muons are sensitive to the internal field primarily through a combination of hyperfine and Lorentz fields. The temperature dependences of the internal field and the relaxation rate have been measured and are compared with previous theoretical predictions. © 2010 The American Physical Society.20pPSB-17 111型鉄系超伝導体LiFeAsの高圧力下交流磁化率測定(20pPSB 領域8ポスターセッション(低温III(鉄系超伝導体)),領域8(強相関系:高温超伝導,強相関f電子系など))
(2010) 581
Muon-spin relaxation and heat capacity measurements on the magnetoelectric and multiferroic pyroxenes LiFeSi2O6 and NaFeSi2O6
(2010)