Circumstantial evidence for hydrogen-induced surface magnetism on Pd(110)

Amann, Peter; Cordin, Michael; Redinger, Josef; Stolwijk, Sebastian D.; Zumbrägel, K.; Donath, M.; Bertel, E.; Menzel, A.

doi:10.1103/physrevb.85.094428

Cited by 4 publications

(2 citation statements)

References 41 publications

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“…Based on these results, we expect detailed calculations of the spatially and band-resolved electronic structure in finite thickness Pd slabs would exhibit novel properties, but we find no evidence of a tendency towards magnetism, as has been predicted for much thinner layers 34 and found in some Pd nanoparticles 36 and possibly in hydrogen-coated Pd. 42 Instead, the reduction of shift in thinner films is at least qualitatively consistent with magnetic and NMR measurements in Pt 9,11 and Pd 32 nanoparticles.…”

Section: Discussionsupporting

confidence: 79%

Finite-size effects in the nuclear magnetic resonance of epitaxial palladium thin films

et al. 2013

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We have measured the NMR of 8 Li + implanted in a set of thin epitaxial films of Pd. We find a large, negative, strongly temperature-dependent Knight shift K consistent with previous measurements on polycrystalline films. The temperature dependence of the shift exhibits a characteristic deviation from the susceptibility χ (T). In particular, at low temperature, K(T) continues to follow a simple Curie-Weiss dependence. This result provides important insight into the origin of the low-temperature behavior of χ (T) in strongly paramagnetic metals. In addition, we find the room temperature shift depends on film thickness, with changes on the order of 20% between films 100 nm and 30 nm thick. We also observe a surface-related resonance in both Au-capped and uncapped films with a small positive shift. These features bear a striking similarity to the Pt NMR line shapes in much smaller Pt particles. However, they seem to originate, not from adsorbed species, but rather in confinement effects on the highly exhange-enhanced Pd d band.

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Section: Discussionsupporting

confidence: 79%

Finite-size effects in the nuclear magnetic resonance of epitaxial palladium thin films

et al. 2013

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“…22,25,26 Amanna et al 25 reported an H-induced magnetic order on the Pd(110) surface. Okada et al 26 predicted a ferrimagnetic spin ordering in various DB networks created on an H-passivated Si(111) surface.…”

Section: Resultsmentioning

confidence: 99%

Antiferromagnetic ordering of dangling-bond electrons at the stepped Si(001) surface

Lee

Kim

Cho

2013

The Journal of Chemical Physics

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Using first-principles density-functional calculations, we explore the possibility of magnetic order at the rebonded DB step of the Si(001) surface. The rebonded DB step containing threefold coordinated Si atoms can be treated as a one-dimensional dangling-bond (DB) wire along the step edge. We find that Si atoms composing the step edge are displaced up and down alternatively due to Jahn-Teller-like distortion, but, if Si dimers on the terrace are passivated by H atoms, the antiferromagnetic (AFM) order can be stabilized at the step edge with a suppression of Jahn-Teller-like distortion. We also find that the energy preference of AFM order over Jahn-Teller-like distortion is enhanced in an oscillatory way as the length of DB wires decreases, showing the so-called quantum size effects.

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Investigation of the (1×2)-H/Pd(110)-pr system using DFT

Shuttleworth

2013

Chemical Physics Letters

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Circumstantial evidence for hydrogen-induced surface magnetism on Pd(110)

Cited by 4 publications

References 41 publications

Finite-size effects in the nuclear magnetic resonance of epitaxial palladium thin films

Finite-size effects in the nuclear magnetic resonance of epitaxial palladium thin films

Antiferromagnetic ordering of dangling-bond electrons at the stepped Si(001) surface

Investigation of the (1×2)-H/Pd(110)-pr system using DFT

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