μSR study on SDW transition in Ce(Ru0.95Rh0.05)2Si2

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Abstract

ZF-μSR measurement on Ce(Ru0.95Rh0.05)2Si2 single-crystalline sample with incident muon beam along both the a- and c-axis showed an exponential relaxation above about TN=2.0 K and two component relaxations were found below 2.0 K. One is a Gaussian relaxation signal which is the precursor of SDW ordering and the other is an exponential relaxation due to the fluctuation of 4f-electron moment. The Gaussian relaxation rate σ increases steeply with decreasing temperature, reflecting the broad field distribution under SDW ordering, and vanishes below 1.8 K. The exponential relaxation rate λ showed critical slowing down with SDW ordering near TN for both a- and c-axis. These behaviors were analyzed by the SCR theory with finite ordering temperature.

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Acknowledgements

This work was partially supported by the Grant-in-Aid for Scientific Research (B) and Monbusho International Scientific Research Program: Joint research from the Ministry of Education, Sports, Science and Culture.

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