Zobrazeno 1 - 10
of 43
pro vyhledávání: '"RATCLIFF, P. W."'
Autor:
Gao, T. R., Zhang, X. H., Ratcliff II, W., Maruyama, S., Murakami, M., Anbusathaiah, V., Yamani, Z., Chen, P. J., Shull, R., Ramesh, R., Takeuchi, I.
Electric-field (E-field) control of magnetism enabled by multiferroics has the potential to revolutionize the landscape of present memory devices plagued with high energy dissipation. To date, this E-field controlled multiferroic scheme at room tempe
Externí odkaz:
http://arxiv.org/abs/1611.07482
We report neutron diffraction and magnetization studies of the magnetic order in multiferroic BiFeO3. In ferroelectric monodomain single crystals, there are three magnetic cycloidal domains with propagation vectors equivalent by crystallographic symm
Externí odkaz:
http://arxiv.org/abs/1104.3109
Autor:
Tian, W., Ratcliff II, W., Kim, M. G., Yan, J. -Q., Kienzle, P. A., Huang, Q., Jensen, B., Dennis, K. W., McCallum, R. W., Lograsso, T. A., McQueeney, R. J., Goldman, A. I., Lynn, J. W., Kreyssig, A.
Publikováno v:
Phys. Rev. B 82, 060514(R) (2010)
The structural and magnetic phase transitions have been studied on NdFeAsO single crystals by neutron and x-ray diffraction complemented by resistivity and specific heat measurements. Two low-temperature phase transitions have been observed in additi
Externí odkaz:
http://arxiv.org/abs/1006.1135
Autor:
Ratcliff II, W., Kienzle, P. A., Lynn, Jeffrey W., Li, Shiliang, Dai, Pengcheng, Chen, G. F., Wang, N. L.
Neutron diffraction measurements have been carried out to investigate the magnetic form factor of the parent SrFe2As2 system of the iron-based superconductors. The general feature is that the form factor is approximately isotropic in wave vector, ind
Externí odkaz:
http://arxiv.org/abs/1001.1941
Autor:
Jo, Y. J., Lee, Seongsu, Choi, E. S., Yi, H. T., Ratcliff II, W., Choi, Y. J., Kiryukhin, V., Cheong, S. W., Balicas, L.
Ferroelectric Ising chain magnet Ca$_3$Co$_{2-x}$Mn$_x$O$_6$ ($x\simeq$0.96) was studied in magnetic fields up to 33 T. Magnetization and neutron scattering measurements reveal successive metamagnetic transitions from the zero-field $\uparrow \uparro
Externí odkaz:
http://arxiv.org/abs/0812.3801
Publikováno v:
Phys. Rev. B 78, 100101(R) (2008)
We report polarized neutron scattering and piezoresponse force microscopy studies of millimeter-sized single crystals of multiferroic BiFeO$_3$. The crystals, grown below the Curie temperature, consist of a single ferroelectric domain. Two unique ele
Externí odkaz:
http://arxiv.org/abs/0809.2108
Autor:
Zhao, Jun, Yao, Dao-Xin, Li, Shiliang, Hong, Tao, Chen, Y., Chang, S., Ratcliff II, W., Lynn, J. W., Mook, H. A., Chen, G. F., Luo, J. L., Wang, N. L., Carlson, E. W., Hu, Jiangping, Dai, Pengcheng
Publikováno v:
Phys. Rev. Lett. 101, 167203 (2008)
We report inelastic neutron scattering studies of magnetic excitations in antiferromagnetically ordered SrFe$_{2}$As$_{2}$ ($T_{N}=220$ K), the parent compound of the FeAs-based superconductors. At low temperatures (T=7 K), the spectrum of magnetic e
Externí odkaz:
http://arxiv.org/abs/0808.2455
Autor:
Zhao, Jun, Ratcliff II, W., Lynn, J. W., Chen, G. F., Luo, J. L., Wang, N. L., Hu, Jiangping, Dai, Pengcheng
Publikováno v:
Phys. Rev. B 78, 140504 (R) (2008).
We use neutron scattering to study the spin and lattice structure on single crystals of SrFe2As2, the parent compound of the FeAs based superconductor (Sr,K)Fe2As2. We find that SrFe2As2 exhibits an abrupt structural phase transitions at 220K, where
Externí odkaz:
http://arxiv.org/abs/0807.1077
Autor:
de la Cruz, Clarina, Huang, Q., Lynn, J. W., Li, Jiying, Ratcliff II, W., Zarestky, J. L., Mook, H. A., Chen, G. F., Luo, J. L., Wang, N. L., Dai, Pengcheng
Publikováno v:
Nature 453, 899 (2008).
In high-transition temperature (high-Tc) copper oxides, it is generally believed that antiferromagnetism plays a fundamental role in the superconducting mechanism because superconductivity occurs when mobile electrons or holes are doped into the anti
Externí odkaz:
http://arxiv.org/abs/0804.0795
ZnCr2O4 undergoes a first order spin-Peierls-like phase transition at 12.5 K from a cubic spin liquid phase to a tetragonal Neel state. Using powder diffraction and single crystal polarized neutron scattering, we determined the complex spin structure
Externí odkaz:
http://arxiv.org/abs/0709.4475