B. Hitti

Static magnetic ordering of CeCu2.1Si2 found by muon spin relaxation

Abstract Zero- and longitudinal-field muon spin relaxation measurements on a poly-crystal sample of a heavy-fermion superconductor CeCu2.1Si2 ( Tc = 0.7 K) have revealed an onset of static magnetic ordering below T ∼ 0.8 K. The line shapes of the observed spectra in zero field indicate a wide distribution of static random local fields at muon sites, suggesting that the ordering is either spin glass or incommensurate spin-density-wave state. The observed width of the random local field at T = 0.05 K corresponds to a small averaged static moment of the order of 0.1μB per formula unit.

Sites and diffusion for muons and hydrogen in titanium hydrides

Low temperature sites for muons implanted in TiHx have been found to be a mixture of interstitial and substitutional sites, with substitutional occupancy determined by the probability that a muon in an interstitial site will have a vacant nearest neighbor substitutional site. As with ZrHx, activation from the interstitial site is observed below 300 K. From the depolarization rate in the substitutional site, the muon likely displaces the neighboring H atoms by about 0.1 A. Diffusion for the substitutional muons occurs above room temperature with an activation of about 0.38 eV, which is less than the 0.505 eV for hydrogen vacancy motion observed by NMR. To explain this the muon transition rate to a vacancy must be less than that of hydrogen.

Uniaxial pressure effect on the magnetic ordered moment and transition temperatures in BaFe2-xTxAs2 ( T=Co,Ni )

We use neutron diffraction and muon spin relaxation to study the effect of in-plane uniaxial pressure on the antiferromagnetic (AF) orthorhombic phase in BaFe

Muon Diffusion in Nb-H Systems

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A comparative muon spin relaxation (μSR) study of titanium and yttrium dihydrides

As

Muon spin relaxation in CeCu2Si2 and muon knight shift in various heavy-fermion systems

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Trapping and diffusion mechanism in aluminum alloys

and its Co- and Ni-substituted members near optimal superconductivity. In the low temperature AF ordered state, uniaxial pressure necessary to detwin the orthorhombic crystals also increases the magnetic ordered moment, reaching an 11

Evidence of frustrated magnetism in CeAl/sub 3/ from muon-spin-rotation spectroscopy

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Study of the 1-K phase transition in the heavy-electron compound UCu5 by muon spin resonance and neutron scattering.

increase under 40 MPa for BaFe

micro+ spin resonance in single crystal PrNi5: Evidence for local moments at Ni sites.

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