Zobrazeno 1 - 10
of 222
pro vyhledávání: '"Rumberger, E."'
Autor:
Bal, M., Friedman, Jonathan R., Chen, W., Tuominen, M. T., Beedle, C. C., Rumberger, E. M., Hendrickson, D. N.
Publikováno v:
Europhys. Lett., 82, 17005 (2008)
We measure magnetization changes in a single crystal of the single-molecule magnet Fe8 when exposed to intense, short (<20 $\mu$s) pulses of microwave radiation resonant with the m = 10 to 9 transition. We find that radiation induces a phonon bottlen
Externí odkaz:
http://arxiv.org/abs/0706.3471
We describe an experiment aimed at measuring the spin dynamics of the Fe8 single-molecule magnet in the presence of pulsed microwave radiation. In earlier work, heating was observed after a 0.2-ms pulse of intense radiation, indicating that the spin
Externí odkaz:
http://arxiv.org/abs/cond-mat/0512289
Autor:
Bal, M., Friedman, Jonathan R., Rumberger, E. M., Shah, S., Hendrickson, D. N., Avraham, N., Myasoedov, Y., Shtrikman, H., Zeldov, E.
Microwave radiation applied to single-molecule magnets can induce large magnetization changes when the radiation is resonant with transitions between spin levels. These changes are interpreted as due to resonant heating of the sample by the microwave
Externí odkaz:
http://arxiv.org/abs/cond-mat/0508774
Autor:
Avraham, Nurit, Stern, Ady, Suzuki, Yoko, Mertes, K. M., Sarachik, M. P., Zeldov, E., Myasoedov, Y., Shtrikman, H., Rumberger, E. M., Hendrickson, D. N., Chakov, N. E., Christou, G.
The spatial profile of the magnetization of Mn12 crystals in a swept magnetic field applied along the easy axis is determined from measurements of the local magnetic induction along the sample surface using an array of Hall sensors. We find that the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0505264
Autor:
Bal, M., Friedman, Jonathan R., Suzuki, Y., Rumberger, E. M., Hendrickson, D. N., Avraham, N., Myasoedov, Y., Shtrikman, H., Zeldov, E.
Publikováno v:
Europhys. Lett., 71, 110 (2005).
Resonant microwave radiation applied to a single crystal of the molecular magnet Fe_8 induces dramatic changes in the sample's magnetization. Transitions between excited states are found even though at the nominal system temperature these levels have
Externí odkaz:
http://arxiv.org/abs/cond-mat/0502424
Autor:
Bal, M., Friedman, Jonathan R., Mertes, K., Chen, W., Rumberger, E. M., Hendrickson, D. N., Avraham, N., Myasoedov, Y., Shtrikman, H., Zeldov, E.
Publikováno v:
Phys. Rev. B 70, 140403(R) (2004)
We used a Josephson junction as a radiation detector to look for evidence of the emission of electromagnetic radiation during magnetization avalanches in a crystal assembly of Mn_12-Acetate. The crystal assembly exhibits avalanches at several magneti
Externí odkaz:
http://arxiv.org/abs/cond-mat/0406410
Autor:
Bal, M., Friedman, Jonathan R., Suzuki, Y., Mertes, K., Rumberger, E. M., Hendrickson, D. N., Myasoedov, Y., Shtrikman, H., Avraham, N., Zeldov, E.
Publikováno v:
Phys. Rev. B 70, 100408(R) (2004)
We use millimeter wave radiation to manipulate the populations of the energy levels of a single crystal molecular magnet Fe8. When a continuous wave radiation is in resonance with the transitions from the ground state to the first excited state, the
Externí odkaz:
http://arxiv.org/abs/cond-mat/0404448
Autor:
del Barco, E., Kent, A. D., Hill, S., North, J. M., Dalal, N. S., Rumberger, E. M., Hendrickson, D. N., Chakov, N., Christou, G.
The symmetry of magnetic quantum tunneling (MQT) in the single molecule magnet Mn12-acetate has been determined by sensitive low-temperature magnetic measurements in the pure quantum tunneling regime and high frequency EPR spectroscopy in the presenc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0404390
Publikováno v:
Phys. Rev. Lett. 91, 047203-1 (2003)
The symmetry of magnetic quantum tunneling has been studied in the prototype single molecule magnet Mn$_{12}$-acetate using a micro-Hall effect magnetometer and superconducting high field vector magnet system. An average crystal fourfold symmetry is
Externí odkaz:
http://arxiv.org/abs/cond-mat/0304206
Publikováno v:
Europhys. Lett. 60(5), pp. 768-774 (2002)
A Landau-Zener multi-crossing method has been used to investigate the tunnel splittings in high quality Mn$_{12}$-acetate single crystals in the pure quantum relaxation regime and for fields applied parallel to the magnetic easy axis. With this metho
Externí odkaz:
http://arxiv.org/abs/cond-mat/0209167