Matias URDAMPILLETA - TEL
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Matias URDAMPILLETA - TEL

Matias URDAMPILLETA - TEL Matias URDAMPILLETA - TEL

tel.archives.ouvertes.fr
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01.08.2013 Views

tel-00770488, version 1 - 7 Jan 2013 Probabilité de relaxer 1.0 0.8 0.6 0.4 0.2 0.0 4 5 67100 2 3 4 5 67 1000 2 3 4 Temps (s) 0.58 T 0.57 T 0.56 T τ (s) 1000 800 600 400 200 0 4.8 5.0 5.2 5.4 -3 -3 µ 0H0 (T ) y = 1 − exp(−t/τ) τ 0 0 P = 1 − exp(−t/τ) τ −3 0.59 P = 1 − exp(−tτ) d2P = 0 dt2 dP dt 1 = τ e−t/τ = 1 (1 − P ) τ d2P 1 1 dP = −dτ (1 − P ) − dt2 dt τ 2 τ dt 5.6 5.8 = 0

tel-00770488, version 1 - 7 Jan 2013 µ 0 Hswitching (T) 0.75 0.70 0.65 0.60 y = a x 1/4 points expérimentaux 4 6 8 0.001 2 4 6 8 0.01 µ 0 dH/dt (T/s) 2 4 6 8 0.1 y = ax 1/4 dτ dt d2P P − 1 = dt2 τ 2 dτ dt + 1 = −1 βH > kT dτ dt ∝ H−4 dH dt Hsw ∝ v 1/4 −1 0 = 0.57 100 −1

tel-00770488, version 1 - 7 Jan 2013<br />

<br />

µ 0 Hswitching (T)<br />

0.75<br />

0.70<br />

0.65<br />

0.60<br />

y = a x 1/4<br />

points expérimentaux<br />

4 6 8 0.001<br />

2 4 6 8 0.01<br />

µ 0 dH/dt (T/s)<br />

2 4 6 8 0.1<br />

<br />

<br />

y = ax 1/4 <br />

dτ<br />

dt<br />

d2P P − 1<br />

=<br />

dt2 τ 2<br />

<br />

dτ<br />

dt<br />

<br />

+ 1<br />

= −1 βH > kT <br />

dτ<br />

dt<br />

∝ H−4 dH<br />

dt<br />

<br />

<br />

Hsw ∝ v 1/4 <br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

<br />

−1 <br />

0 = 0.57 100 −1

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