Muon diffusion and electronic magnetism in Y$_2$Ti$_2$O$_7$

J. A. Rodriguez; A. Yaouanc; B. Barbara; E. Pomjakushina; P. Quémerais; Z. Salman

doi:10.1103/PhysRevB.87.184427

Muon diffusion and electronic magnetism in Y$_2$Ti$_2$O$_7$

Strongly Correlated Electrons 2015-06-15 v1

Authors: J. A. Rodriguez , A. Yaouanc , B. Barbara , E. Pomjakushina , P. Quémerais , Z. Salman

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Abstract

We report a $\mu$ SR study in a Y $_2$ Ti $_2$ O $_7$ single crystal. We observe slow local field fluctuations at low temperature which become faster as the temperature is increased. Our analysis suggests that muon diffusion is present in this system and becomes small below 40 K and therefore incoherent. A surprisingly strong electronic magnetic signal is observed with features typical for muons thermally diffusing towards magnetic traps below $\approx 100$ K and released from them above this temperature. We attribute the traps to Ti $^{3+}$ defects in the diluted limit. Our observations are highly relevant to the persistent spin dynamics debate on $R_2$ Ti $_2$ O $_7$ pyrochlores and their crystal quality.

Keywords

muon diffusion electronic magnetism Y2Ti2O7 muon spin rotation spin dynamics pyrochlores

Cite

@article{arxiv.1303.3401,
  title  = {Muon diffusion and electronic magnetism in Y$_2$Ti$_2$O$_7$},
  author = {J. A. Rodriguez and A. Yaouanc and B. Barbara and E. Pomjakushina and P. Quémerais and Z. Salman},
  journal= {arXiv preprint arXiv:1303.3401},
  year   = {2015}
}

Muon diffusion and electronic magnetism in Y$_2$Ti$_2$O$_7$

Abstract

Keywords

Cite

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