Stable Existence of Phase IV inside Phase II under Pressure in Ce0.8_{0.8}La0.2_{0.2}B6_{6}

We investigate the pressure effect of the electrical resistivity and magnetization of Ce$_{0.8}$La$_{0.2}$B$_{6}$. The situation in which phase IV stably exists inside phase II at H=0 T could be realized by applying a pressure above $P\sim 1.1$ GPa. This originates from the fact that the stability of phase II under pressure is larger than those of phases IV and III. The results seem to be difficult to reproduce by taking the four interactions of $\Gamma_{\mathrm{5u}}$-type AFO, $O_{xy}$-type AFQ, $T_{xyz}$-type AFO, and AF exchange into account within a mean-field calculation framework.Comment: 4 pages, 5 figures, to appear in J. Phys. Soc. Jpn. 79 (2010) No.

An assessment of the functional outcomes of patients undergoing early exercise physiotherapy following arthroscopic rotator cuff repair using the double-row suture bridge technique

Background: The methods of repairing rotator cuff tear are single-row technique, traditional double-row technique and suture-bridge technique. Studies have shown that the arthroscopic suture-bridge technique improved the pressurized contact area between the tendon and footprint. Controversy exists regarding the influence of early versus delayed motion on stiffness and healing rate after cuff repair. Early motion rehabilitation increases range of motion after cuff repair, although risk of re-tear is higher compared to immobilization. This study evaluated the functional outcomes in patients who underwent arthroscopic rotator cuff repair using the suture-bridge technique followed by an early exercise physiotherapy regime.Methods: The study was a prospective and retrospective analysis of patients treated arthroscopically for rotator cuff tears in Hosmat hospital, Bangalore. 30 patients who had only a supraspinatus/infraspinatus tear were included in the study. The functional outcome was assessed by two scoring systems, UCLA and ASES scores. Post operatively, patients were immobilized for 3 weeks only. They were followed up at 3 weeks, 6 weeks, 12 weeks and at 6 months.Results: Our study had 20 patients reporting a good outcome, whereas 9 patients had a fair outcome. Only 1 patient reported a poor outcome. The mean ASES scores improved from 20.43 to 77.87 whereas the UCLA score improved from 10.03 to 27.93. None had re-tears.Conclusions: The arthroscopic suture-bridge technique resulted in acceptable patient satisfaction and functional outcome as 67% of our patients had a “good” outcome. Early ROM exercise accelerated recovery from postoperative stiffness for patients after arthroscopic rotator cuff repair.

AA-cation control of magnetoelectric quadrupole order in AA(TiO)Cu4_4(PO4_4)4_4 (AA = Ba, Sr, and Pb)

Ferroic magnetic quadrupole order exhibiting macroscopic magnetoelectric activity is discovered in the novel compound $A$(TiO)Cu$_4$(PO$_4$)$_4$ with $A$ = Pb, which is in contrast with antiferroic quadrupole order observed in the isostructural compounds with $A$ = Ba and Sr. Unlike the famous lone-pair stereochemical activity which often triggers ferroelectricity as in PbTiO$_3$, the Pb$^{2+}$ cation in Pb(TiO)Cu$_4$(PO$_4$)$_4$ is stereochemically inactive but dramatically alters specific magnetic interactions and consequently switches the quadrupole order from antiferroic to ferroic. Our first-principles calculations uncover a positive correlation between the degree of $A$-O bond covalency and a stability of the ferroic quadrupole order.Comment: 7 pages, 4 figure

K-Shell Ionization of Rare Earth Elements in the Energy Range of 3-40 MeV/amu

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M-Shell X-Ray Transition Rates for Heavy Rare Earth Elements

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Continuum X Rays of 10-70 keV form Carbon Thick-Target Bombarded by 3 MeV Protons

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Kondo effect in CeXc_{c} (Xc_{c}=S, Se, Te) studied by electrical resistivity under high pressure

We have measured the electrical resistivity of cerium monochalcogenices, CeS, CeSe, and CeTe, under high pressures up to 8 GPa. Pressure dependences of the antiferromagnetic ordering temperature $T_{N}$, crystal field splitting, and the $\ln T$ anomaly of the Kondo effect have been studied to cover the whole region from the magnetic ordering regime at low pressure to the Fermi liquid regime at high pressure. $T_{N}$ initially increases with increasing pressure, and starts to decrease at high pressure as expected from the Doniach's diagram. Simultaneously, the $\ln T$ behavior in the resistivity is enhanced, indicating the enhancement of the Kondo effect by pressure. It is also characteristic in CeX$_{c}$ that the crystal field splitting rapidly decreases at a common rate of $-12.2$ K/GPa. This leads to the increase in the degeneracy of the $f$ state and further enhancement of the Kondo effect. It is shown that the pressure dependent degeneracy of the $f$ state is a key factor to understand the pressure dependence of $T_{N}$, Kondo effect, magnetoresistance, and the peak structure in the temperature dependence of resistivity.Comment: 9 pages, 5 figures, accepted for publication in J. Phys. Soc. Jp

Projectile-charge dependence of quasi-free-electron bremsstrahlung

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Projectile-Charge Dependence of Quasifree-Electron Bremsstrahlung

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