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Tracking Temperature Dependent Relaxation Times of Individual Ferritin Nanomagnets with a Wide-band Quantum Spectrometer

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arxiv 1406.0362 v1 pith:IL5DIOMG submitted 2014-06-02 cond-mat.mes-hall

Tracking Temperature Dependent Relaxation Times of Individual Ferritin Nanomagnets with a Wide-band Quantum Spectrometer

Eike Sch\"afer-Nolte , Lukas Schlipf , Markus Ternes , Friedemann Reinhard , Klaus Kern , J\"org Wrachtrup This is my paper
classification cond-mat.mes-hall
keywords ferritinmagnetictemperaturecenterenablesindividualnanomagnetsnitrogen-vacancy
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We demonstrate the tracking of the spin dynamics of ensemble and individual magnetic ferritin proteins from cryogenic up to room temperature using the nitrogen-vacancy color center in diamond as magnetic sensor. We employ different detection protocols to probe the influence of the ferritin nanomagnets on the longitudinal and transverse relaxation of the nitrogen-vacancy center, which enables magnetic sensing over a wide frequency range from Hz to GHz. The temperature dependence of the observed spectral features can be well understood by the thermally induced magnetization reversals of the ferritin and enables the determination of the anisotropy barrier of single ferritin molecules.

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