12037-84-2Relevant academic research and scientific papers
31P nuclear magnetic relaxation studies of the dynamical magnetic behavior of UP
Takagi, Shigeru,Niitsuma, Norio,Yoshida, Teiji,Kasuya, Tadao
, p. 2287 - 2290 (1987)
31P nuclear magnetic relaxation has been utilized to study the spin dynamics of U 5f moments in the antiferromagnetic uranium compound UP in the paramagnetic state up to 800 K. The nuclear spin-lattice relaxation time T1 increases al
Near-surface effects at the antiferromagnetic phase transition in uranium phosphide
Stunault,Langridge,Vettier,Gibbs,Bernhoeft
, p. 423 - 438 (1997)
A careful investigation of the resonant x-ray magnetic-scattering response in uranium monophosphide reveals the crucial role played by magnetization density correlations in the discontinuous paramagnetic to antiferromagnetic phase transition in this material. The magnetization density correlations, which are measured on the short time scale typical of the resonant x-ray-scattering technique, appear highly anisotropic in their inferred spatial distribution. Such correlated regions exist in the near-surface regime probed by the low-energy x-ray beam (3.278 keV) and exhibit strongly temperature-dependent behavior at and above the bulk phase transition. For specular reflections this leads to well defined two length scale diffraction profiles in the vicinity of the phase transition and, when taken with the off-specular data, to a phenomenological model which suggests that the extended length scale of near-surface antiferromagnetism may arise from a localized surface distortion. This type of model may be more generally useful both in the two length scale problem and in other systems where defects or fluctuations may, in a similar manner, drive pseudo-long-range order.
