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21.
μSR spectra on the spin frustrating spinel antiferromagnet Zn(Cr
x
Ga1−x
)2O4 (x=0.9,1.0) have been measured. For x=1.0 compound, both the relaxation rate and the initial asymmetry showed distinct anomalies at the Néel temperature. The magnetic
susceptibility for the x=0.9 compound was known to have a faint peak at around 12 K, whose origin was not clear so far. Our μSR study revealed that
this temperature is the onset temperature of development of the magnetic correlation accompanied by appreciable spin fluctuations.
This revised version was published online in September 2006 with corrections to the Cover Date. 相似文献