Gradual evolution in spin dynamics of TlCu1−xMgxCl3 probed by muon-spin-relaxation (μSR) technique

Suzuki, Takao; Watanabe, Isao; Yamada, Fumiaki; Ishii, Yasuyuki; Ohishi, Kazuki; Goto, Takayuki; Tanaka, Hidekazu

doi:10.1088/1742-6596/502/1/012041

Cited by 1 publication

(1 citation statement)

References 15 publications

(19 reference statements)

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“…Although there have been suggestions that within these SP-type systems muon induced perturbations occur leading to paramagnetic defects [36][37][38], within our work, we see features in both the ESR and magnetic susceptibility measurements suggesting this effect is present regardless of the presence of a muon. However the fact that the percentage of the signals from the magnetic measurements and muon measurements related to the defect state are different, this may suggest that either; the magnetic measurements are giving an underestimate due to competition between magnetic responses or the muons preferentially stop near the defects as these could have a high amount of electron density associated with them, although it cannot be discounted that the muon may be able to perturb the environment promoting creation of a similar defect state that is observed in the magnetic data.…”

Section: Resultscontrasting

confidence: 67%

Magnetic ordering of defects in a molecular spin-Peierls system

Berlie¹,

Terry²,

Cottrell³

et al. 2016

J. Phys.: Condens. Matter

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With interest in charge transfer compounds growing steadily, it is important to understand all aspects of the underlying physics of these systems, including the properties of the defects and interfaces that are universally present in actual experimental systems. For the study of these defects and their interactions a spin-Peierls (SP) system provides a useful testing ground. This work presents an investigation within the SP phase of potassium TCNQF 4 where anomalous features are observed in both the magnetic susceptibility and ESR spectra for temperatures between 60 K and 100 K. Muon spin spectroscopy measurements confirm the presence of these anomalous magnetic features, with low temperature zero-field data exhibiting the damped oscillatory form that is a characteristic signature of static magnetic order. This ordering is most likely due to the interaction between structurally correlated magnetic defects in the system. The critical behaviour of the temperature dependent muon spin rotation frequency indicates that a 2D Ising model is applicable to the magnetic ordering of these defects. We show that these observations can be explained by a simple model in which the magnetic defects are located at stacking faults, which provide them with a 2D structural framework to constrain their interactions.

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Section: Resultscontrasting

confidence: 67%