Fitting parameters obtained from tri- or biexponential fits of the isothermal excitation and relaxation data obtained in the SQUID magnetometric as well as the UV/vis and NEXAFS spectroscopic experiments. The isotherm data were measured at 5 K in the former two and at 8 K in the latter experiment.

		A 1	k 1/s−1	A 2	k 2/s−1	A 3	k 3/s−1	γ HS,∞
Excitation	SQUID	0.457 ± 0.003	(9.4 ± 0.1) × 10−4	0.21 ± 0.01	(1.2 ± 0.1) × 10−2	0.33 ± 0.01	(1.9 ± 0.6) × 10−1	1.000 ± 0.006
	NEXAFS	0.096 ± 0.007	(1.0 ± 0.3) × 10−2	0.06 ± 0.01	(1.5 ± 0.7) × 10−1	0.15 ± 0.01	1.5 ± 0.2	0.888 ± 0.007
Relaxation	SQUID	0.92 ± 0.01	(3.5 ± 0.4) × 10−5	0.056 ± 0.004	(2.8 ± 0.7) × 10−3	0.02 ± 0.01	(2 ± 1) × 10−2	—
	UV/vis	0.43 ± 0.04	(1.3 ± 0.7) × 10−5	0.35 ± 0.04	(2.8 ± 0.4) × 10−4	0.22 ± 0.02	(7 ± 1) × 10−3	—
	NEXAFS	0.91 ± 0.04	(1.3 ± 1.6) × 10−5	0.09 ± 0.04	(1.4 ± 0.6) × 10−3	—	—	—