Zobrazeno 1 - 10
of 70
pro vyhledávání: '"Lee, J. C. T."'
Autor:
Lee, J. C. T, Mishra, S. K., Bhat, V. S., Streubel, R., Farmer, B., Shi, X., De Long, L. E., McNulty, I., Fischer, P., Kevan, S. D., Roy, S.
Publikováno v:
Phys. Rev. B 99, 024406 (2019)
We report evidence of spontaneous formation of a heterogeneous network of superdomains in two-dimensional square artificial spin ice nanostructures in externally applied magnetic fields. The magnetic heterogeneity is locally disordered but has a zig-
Externí odkaz:
http://arxiv.org/abs/1711.00182
Autor:
Montoya, S. A., Couture, S., Chess, J. J., Lee, J. C. T, Kent, N., Im, M. -Y., Kevan, S. D., Fischer, P., McMorran, B. J., Roy, S., Lomakin, V., Fullerton, E. E.
Publikováno v:
Phys. Rev. B 95, 224405 (2017)
The dynamic response of dipole skyrmions in Fe/Gd multilayer films is investigated by ferromagnetic resonance measurements and compared to micromagnetic simulations. We detail thickness and temperature dependent studies of the observed modes as well
Externí odkaz:
http://arxiv.org/abs/1702.04691
Autor:
Lee, J. C. T, Mishra, S. K., Bhat, V. S., Streubel, R., Farmer, B., Shi, X., De Long, L. E., McNulty, I., Fischer, P., Kevan, S. D., Roy, S.
We report direct evidence that magnetically charged superdomain walls form spontaneously in two dimensional square artificial spin ice nanostructures in response to external magnetic fields. These extended magnetic defects were revealed by the develo
Externí odkaz:
http://arxiv.org/abs/1609.07828
Autor:
Montoya, S. A., Couture, S., Chess, J. J., Lee, J. C. T., Kent, N., Henze, D., Sinha, S. K., Im, M. -Y., Kevan, S. D., Fischer, P., McMorran, B. J., Lomakin, V., Roy, S., Fullerton, E. E.
Publikováno v:
Phys. Rev. B 95, 024415 (2017)
The interesting physics and potential memory technologies resulting from topologically protected spin textures such as skyrmions, has prompted efforts to discover new material systems that can host these kind of magnetic structures. Here we use the h
Externí odkaz:
http://arxiv.org/abs/1608.01368
Autor:
Lee, J. C. T, Chess, J. J., Montoya, S. A., Shi, X., Tamura, N., Mishra, S. K., Fischer, P., McMorran, B. J., Sinha, S. K., Fullerton, E. E., Kevan, S. D., Roy, S.
We show that properly engineered amorphous Fe-Gd alloy thin films with perpendicular magnetic anisotropy exhibit room-temperature skyrmion molecules, or a pair of like-polarity, opposite-helicity skyrmions. Magnetic mirror symmetry planes present in
Externí odkaz:
http://arxiv.org/abs/1603.07882
Autor:
Langner, M. C., Roy, S., Mishra, S. K., Lee, J. C. T., Shi, X. W., Hossain, M. A., Chuang, Y. -D., Seki, S., Tokura, Y., Kevan, S. D., Schoenlein, R. W.
We report the observation of the skyrmion lattice in the chiral multiferroic insulator Cu2OSeO3 using Cu L3-edge resonant soft x-ray diffraction. We observe the unexpected existence of two distinct skyrmion sublattices that arise from inequivalent Cu
Externí odkaz:
http://arxiv.org/abs/1402.2947
Autor:
Joe, Y. I., Chen, X. M., Ghaemi, P., Finkelstein, K. D., de la Peña, G. A., Gan, Y., Lee, J. C. T., Yuan, S., Geck, J., MacDougall, G. J., Chiang, T. C., Cooper, S. L., Fradkin, E., Abbamonte, P.
Superconductivity (SC) in so-called "unconventional superconductors" is nearly always found in the vicinity of another ordered state, such as antiferromagnetism, charge density wave (CDW), or stripe order. This suggests a fundamental connection betwe
Externí odkaz:
http://arxiv.org/abs/1309.4051
X-ray absorption in $\rm Sr_{2}CuO_{4-\delta}-La_{2}CuO_4$ (SCO-LCO) superlattices shows a variable occupation with doping of a hole state different from holes doped for $x \lesssim x_{optimal}$ in bulk $\rm La_{2-x}Sr_{x}CuO_4$ and suggests that thi
Externí odkaz:
http://arxiv.org/abs/1111.2639
Autor:
Chen, X. M., Spanton, E. M., Wang, S., Lee, J. C. T., Smadici, S., Zhai, X., Naibert, T., Eckstein, J. N., Bhattacharya, A., Santos, T., Budakian, R., Abbamonte, P.
We describe a strategy for using resonant soft x-ray scattering (RSXS) to study the electronic structure of transition metal oxide quantum wires. Using electron beam lithography and ion milling, we have produced periodic, patterned arrays of colossal
Externí odkaz:
http://arxiv.org/abs/1109.0734
Autor:
Smadici, S., Lee, J. C. T., Morales, J., Logvenov, G., Pelleg, O., Bozovic, I., Zhu, Y., Abbamonte, P.
Publikováno v:
Physical Review B 84, 155411 (2011)
X-ray absorption spectroscopy and resonant soft x-ray reflectivity show a non-uniform distribution of oxygen holes in a La2NiO4 - La2CuO4 (LNO-LCO) superlattice, with excess holes concentrated in the LNO layers. Weak ferromagnetism with Tc = 160 K su
Externí odkaz:
http://arxiv.org/abs/1106.0634