Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates

Details Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates

2001-10-08

arxiv.org/abs/cond-mat/0110158v2

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.65.132506

NMR line shift and nuclear spin-lattice relaxation rate T_1^{-1} of 11B and 25Mg were measured in superconducting MgB_2 (T_c^{ons}=38K) structurally disordered by nuclear reactor neutrons up to the fluence of thermal neutrons $\Phi=1 10^{19} cm^{-2}. The temperature of superconducting transition was shifted down to T_{c,irrad}^{ons}=7K under irradiation. The change due irradiation in the partial electron density of states (DOS) at the Fermi energy of boron and magnesium were traced by taking into account that T_1^{-1} of 11B and 25Mg are determined by hyperfine magnetic interactions with carriers. It was revealed that electronic states near E_F of Mg are influenced negligibly by irradiation whereas partial DOS of the B 2p_{x,y} states reduces greatly in irradiated MgB_2. The NMR estimates for DOS using the McMillan formula show that critical temperature decreases in irradiated MgB_2 mainly due to reduction in the partial DOS of p states of boron.

Affiliated with

Also associated with

No associations

Rating

Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction in the electron density-of-states in superconducting MgB$_2$ disordered by $n^1$-irradiation: the $^{11}$B and $^{25}$Mg NMR estimates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-551987