Exponential " eld distribution in Sr ( Cu 1 ~ x Zn x ) 2 O 3
نویسندگان
چکیده
We discuss the use of the Kubo Golden rule (KGR) in the derivation of new muon polarization functions for arbitrary static "eld distributions in both zero (ZF) and longitudinal (LF) applied "elds. ZF/LF muon spin relaxation measurements in spin-ladder system Sr(Cu 1~x Zn x ) 2 O 3 are reported, with observations of dilute moment freezing for x[0.008 and dense moment freezing for xZ0.008. In neither the dilute nor the dense case do the data conform to classic muon polarization functions. Using the KGR we derive new muon polarization functions to deal with both of these cases. The dilute case assumes dilute moments with a dense moment background, while the dense case assumes an exponential distribution of "elds. Simulation of this system is consistent with an exponential distribution of "elds. ( 2000 Elsevier Science B.V. All rights reserved.
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تاریخ انتشار 2000