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Transmission (arb. units)

IMR : Development of a transient spectrometer for education and research into quantum coherence in molecular nanomagnets Stephen Hill, University of Florida, DMR-0414809. Transmission (arb. units). Time (milliseconds).

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Transmission (arb. units)

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  1. IMR: Development of a transient spectrometer for education and research into quantum coherence in molecular nanomagnetsStephen Hill, University of Florida, DMR-0414809 Transmission (arb. units) Time (milliseconds) We have developed a new experimental technique that integrates high-frequency (1GHz) surface acoustic waves (SAWs) with high-frequency (300GHz) electron para-magnetic resonance (HFEPR) spectroscopy, enabling measurements of magnetization dynamics in molecular nanomagnets on fast time scales. After driving the system out of equilibrium by triggering magnetic avalan-ches, or simply via heating with short SAW pulses, the evolution of the spin populations within different quantum (mS) levels can be probed using HFEPR spectroscopy, with sub-microsecond time resolution. The figure (right) shows a series of measurements on the well known Mn12 (S=10) cluster. The black and red curves are simulations; the similarity between the data and the red curve enables us to estimate the spin-lattice relaxation time. This work has been submitted to Phys. Rev. Lett.

  2. IMR: Development of a transient spectrometer for education and research into quantum coherence in molecular nanomagnetsStephen Hill, University of Florida, DMR-0414809 Education and diversity: 9 graduate students, 4 postdocs, and 6 undergraduates have participated in activities related to this project, as have 6 REU students and 2 high school students. Of these students, two have completed PhDs, and 3 have obtained masters degrees; two of the postdocs obtained faculty positions (the other two continue to be active in research), one of the REU students received a Goldwater fellowship. Nearly half of the students (12/27) are female, and 4 students belong to underrepresented groups. Graduate student exchanges: • Graduate students from several groups from around the US (San Diego, New York and Tallahassee) and Europe (U. Barcelona) have visited the University of Florida (UF) for extended periods (~1 month) in order to collaborate with UF students. In particular, integrated SAW and HFEPR techniques described on the previous slide were developed through the combined expertise of students at UF and from Barcelona.

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