Zobrazeno 1 - 10
of 178
pro vyhledávání: '"Siemons W"'
Autor:
Wong, A. T., Beekman, C., Guo, H., Siemons, W., Gai, Z., Arenholz, E., Takamura, Y., Ward, T. Z.
Publikováno v:
Appl. Phys. Lett. 105, 052401 (2014)
We investigate the effects of strain on antiferromagntic (AFM) single crystal thin films of La$_{1-x}$Sr$_{x}$MnO$_{3}$ (x = 0.6). Nominally unstrained samples have strong magnetoresistance with anisotropic magnetoresistances (AMR) of up to 8%. Compr
Externí odkaz:
http://arxiv.org/abs/1408.7097
Autor:
Beekman, C., Siemons, W., Ward, T. Z., Budai, J. D., Tischler, J. Z., Xu, R., Liu, W., Balke, N., Nam, J. H., Christen, H. M.
Publikováno v:
Appl. Phys. Lett. 102, 221910 (2013)
Synchrotron and lab-scale x-ray diffraction shows that tetragonal-like T'-BiFeO3 films on miscut LaAlO3 substrates (miscut < 5 deg) exhibit (00l)-planes tilted away from those of the substrate as predicted by the "Nagai model" (except for miscut <0.2
Externí odkaz:
http://arxiv.org/abs/1312.3957
Autor:
Ravichandran, J., Yadav, A. K., Siemons, W., McGuire, M. A., Wu, V., Vailionis, A., Majumdar, A., Ramesh, R.
Publikováno v:
Phys. Rev. B 85, 085112 (2012)
We investigated size effects on thermoelectricity in thin films of a strongly correlated layered cobaltate. At room temperature, the thermopower is independent of thickness down to 6 nm. This unusual behavior is inconsistent with the Fuchs-Sondheimer
Externí odkaz:
http://arxiv.org/abs/1201.6274
Autor:
MacDougall, G. J., Christen, H. M., Siemons, W., Biegalski, M. D., Zarestky, J. L., Liang, S., Dagotto, E., Nagler, S. E.
Publikováno v:
Physical Review B 85, 100406(R) (2012)
Recent studies have reported the existence of an epitaxially-stabilized tetragonal-like ('T-like') monoclinic phase in BiFeO3 thin-films with high levels of compressive strain. While their structural and ferroelectric properties are different than th
Externí odkaz:
http://arxiv.org/abs/1107.2975
Misfit Strain Accommodation in Epitaxial ABO3 Perovskites: Lattice Rotations and Lattice Modulations
Autor:
Vailionis, A., Boschker, H., Siemons, W., Houwman, E. P., Blank, D. H. A., Rijnders, G., Koster, G.
We present a study of the lattice response to the compressive and tensile biaxial stress in La0.67Sr0.33MnO3 (LSMO) and SrRuO3 (SRO) thin films grown on a variety of single crystal substrates: SrTiO3, DyScO3, NdGaO3 and (La,Sr)(Al,Ta)O3. The results
Externí odkaz:
http://arxiv.org/abs/1009.6018
Autor:
Kantner, C. L. S., Langner, M. C., Siemons, W., Blok, J. L., Koster, G., Rijnders, A. J. H. M., Ramesh, R., Orenstein, J.
We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15K of the Curie temperature, which is ~ 150K. We analyze the data
Externí odkaz:
http://arxiv.org/abs/1008.0674
Autor:
Pentcheva, R., Huijben, M., Otte, K., Pickett, W. E., Kleibeuker, J. E., Huijben, J., Boschker, H., Kockmann, D., Siemons, W., Koster, G., Zandvliet, H. J. W., Rijnders, G., Blank, D. H. A., Hilgenkamp, H., Brinkman, A.
The perovskite SrTiO$_3$-LaAlO$_3$ structure has advanced to a model system to investigate the rich electronic phenomena arising at polar interfaces. Using first principles calculations and transport measurements we demonstrate that an additional SrT
Externí odkaz:
http://arxiv.org/abs/0912.4671
Ultrathin films of the itinerant ferromagnet SrRuO$_3$ were studied using transport and magnto-optic polar Kerr effect. We find that below 4 monolayers the films become insulating and their magnetic character changes as they loose their simple ferrom
Externí odkaz:
http://arxiv.org/abs/0811.0384
Autor:
Ravichandran, J., Siemons, W., Scullin, M. L., Mukerjee, S., Huijben, M., Moore, J. E., Ramesh, R., Majumdar, A.
We present an approach to tune the effective mass in an oxide semiconductor by a double doping mechanism. We demonstrate this in a model oxide system Sr$_{1-x}$La$_x$TiO$_{3-\delta}$, where we can tune the effective mass ranging from 6--20$\mathrm{m_
Externí odkaz:
http://arxiv.org/abs/0809.4706
Autor:
Xia, Jing, Schemm, Elizabeth, Deutscher, G., Kivelson, S. A., Bonn, D. A., Hardy, W. N., Liang, R., Siemons, W., Koster, G., Fejer, M. M., Kapitulnik, A.
Publikováno v:
Phys. Rev. Lett. 100, 127002 (2008)
Polar Kerr effect in the high-Tc superconductor \YBCO was measured at zero magnetic field with high precision using a cyogenic Sagnac fiber interferometer. We observed non-zero Kerr rotations of order $\sim 1 \mu$rad appearing near the pseudogap temp
Externí odkaz:
http://arxiv.org/abs/0711.2494