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High-field magnetization [#!KatsumataPRL89!#,#!AjiroPRL89!#]
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5.1 Introduction
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5.1.4 Experimental evidence for
Susceptibility [#!RenardEPL87!#,#!RenardJAP88!#,#!GadetPRB91!#,#!AvenelPRB92!#]
The temperature dependence of the magnetic susceptibility (
) was well described by the thermal excitation over an energy gap (
;
K). Avenel
et al.
[
78
] measured
down to 0.3 mK and confirmed the absence of a magnetic order to the milli-Kelvin regime.
) was
well described by the thermal excitation over an energy gap
(
; 
K). Avenel
et al. [78] measured