Zobrazeno 1 - 10
of 1 072
pro vyhledávání: '"Zarestky J"'
Autor:
MacDougall, G. J., Aczel, A. A., Su, Yixi, Schweika, W., Faulhaber, E., Schneidewind, A., Christianson, A. D., Zarestky, J. L., Zhou, H. D., Mandrus, D., Nagler, S. E.
Publikováno v:
Physical Review B 94, 184422 (2016)
The A-site spinel material, CoAl2O4, is a physical realization of the frustrated diamond-lattice antiferromagnet, a model in which is predicted to contain unique incommensurate or `spin-spiral liquid' ground states. Our previous single-crystal neutro
Externí odkaz:
http://arxiv.org/abs/1607.05309
Autor:
Pratt, D. K., Chang, S., Tain, W., Taskin, A. A., Ando, Yoichi, Zarestky, J. L., Kreyssig, A., Goldman, A. I., McQueeney, R. J.
A combined neutron and x-ray diffraction study of TbBaFe2O5 reveals a rare checkerboard to charge ordering transition. TbBaFe2O5 is a mixed valent compound where Fe2+/Fe3+ ions are known to arrange into a stripe charge-ordered state below TV = 291 K,
Externí odkaz:
http://arxiv.org/abs/1210.7228
Autor:
Tucker, G. S., Pratt, D. K., Kim, M. G., Ran, S., Thaler, A., Granroth, G. E., Marty, K., Tian, W., Zarestky, J. L., Lumsden, M. D., Bud'ko, S. L., Canfield, P. C., Kreyssig, A., Goldman, A. I., McQueeney, R. J.
Publikováno v:
Phys. Rev. B 86, 020503(R) (2012)
Inelastic neutron scattering measurements on Ba(Fe0.925Mn0.075)2As2 manifest spin fluctuations at two different wavevectors in the Fe square lattice, (1/2,0) and (1/2,1/2), corresponding to the expected stripe spin-density wave order and checkerboard
Externí odkaz:
http://arxiv.org/abs/1206.3486
Autor:
Wen, Jinsheng, Xu, Zhijun, Xu, Guangyong, Jie, Qing, Huecker, M., Zheludev, A., Tian, Wei, Winn, B. L., Zarestky, J. L., Singh, D. K., Hong, Tao, Li, Qiang, Gu, Genda, Tranquada, J. M.
Publikováno v:
Phys. Rev. B 85, 134512 (2012)
The superconducting system La2-xBaxCuO4 is known to show a minimum in the transition temperature, Tc, at x = 1/8 where maximal stripe order is pinned by the anisotropy within the CuO2 planes that occurs in the low-temperature-tetragonal (LTT) crystal
Externí odkaz:
http://arxiv.org/abs/1111.5383
Autor:
Rotundu, C. R., Tian, W., Rule, K. C., Forrest, T. R., Zhao, J., Zarestky, J. L., Birgeneau, R. J.
We present a combination of elastic neutron scattering measurements in zero and 14.5 T and magnetization measurements in zero and 14 T on under-doped superconducting Ba$_{1-x}$K$_{x}$Fe$_{2}$As$_{2}$ x=0.17, and the same measurements in zero field on
Externí odkaz:
http://arxiv.org/abs/1111.3329
Autor:
Wang, Meng, Wang, Miaoyin, Li, G. N., Huang, Q., Li, C. H., Tan, G. T., Zhang, C. L., Cao, Huibo, Tian, Wei, Zhao, Yang, Chen, Y. C., Lu, X. Y., Sheng, Bin, Luo, H. Q., Li, S. L., Fang, M. H., Zarestky, J. L., Ratcliff, W., Lumsden, M. D., Lynn, J. W., Dai, Pengcheng
Publikováno v:
Phys. Rev. B 84, 094504 (2011)
Neutron diffraction has been used to study the lattice and magnetic structures of the insulating and superconducting Rb$_y$Fe$_{1.6+x}$Se$_2$. For the insulating Rb$_{y}$Fe$_{1.6+x}$Se$_2$, neutron polarization analysis and single crystal neutron dif
Externí odkaz:
http://arxiv.org/abs/1108.2895
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
Autor:
Santos, T. S., Kirby, B. J., Kumar, S., May, S. J., Borchers, J. A., Maranville, B. B., Zarestky, J., Velthuis, S. G. E. te, Brink, J. van den, Bhattacharya, A.
Publikováno v:
Phys. Rev. Lett. 107, 167202 (2011)
We demonstrate that delta-doping can be used to create a dimensionally confined region of metallic ferromagnetism in an antiferromagnetic (AF) manganite host, without introducing any explicit disorder due to dopants or frustration of spins. Delta-dop
Externí odkaz:
http://arxiv.org/abs/1105.0223
Autor:
Pratt, D. K., Kim, M. G., Kreyssig, A., Lee, Y. B., Tucker, G. S., Thaler, A., Tian, W., Zarestky, J. L., Bud'ko, S. L., Canfield, P. C., Harmon, B. N., Goldman, A. I., McQueeney, R. J.
Publikováno v:
Phys. Rev. Lett. 106, 257001 (2011)
Neutron diffraction studies of Ba(Fe[1-x]Co[x])2As2 reveal that commensurate antiferromagnetic order gives way to incommensurate magnetic order for Co compositions between 0.056 < x < 0.06. The incommensurability has the form of a small transverse sp
Externí odkaz:
http://arxiv.org/abs/1104.0717
Autor:
MacDougall, G. J., Gout, D., Zarestky, J. L., Ehlers, G., Podlesnyak, A., McGuire, M. A., Mandrus, D., Nagler, S. E.
Publikováno v:
Proc. Natl. Acad. Sci. USA 108, 15693-15698 (2011)
Frustrated magnetic systems exhibit highly degenerate ground states and strong fluctuations, often leading to new physics. An intriguing example of current interest is the antiferromagnet on a diamond lattice, realized physically in A-site spinel mat
Externí odkaz:
http://arxiv.org/abs/1103.0049