Lattice strains due to hydrogen in metals

Peisl, H.

doi:10.1007/3540087052_42

Cited by 166 publications

(57 citation statements)

References 48 publications

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“…A lattice expansion of 2.9 ϫ10 Ϫ3 nm 3 /H atom is observed. This value agrees with usual observations in intermetallics 14 and with findings of Leithe-Jasper et al 15 in R 6 Fe 13Ϫx M 1ϩx compounds. For the other compounds, the hydrogen uptake was calculated from the expansion of the lattice parameters compared to those of their parent compounds using 2.9ϫ10 Ϫ3 nm 3 /H atom.…”

Section: Methodssupporting

confidence: 93%

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
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The magnetic properties of various R 6 Fe 13Ϫx M 1ϩx compounds (RϭLa, Nd, Gd, and Dy͒ crystallizing in the La 6 Co 11 Ga 3 structure have been investigated by magnetic measurements and x-ray diffraction. It is shown that all Nd 6 Fe 13 M compounds with M ϭAu, Ag, Cu, Si, and Ga order antiferromagnetically around 415 K and evidence is provided that the frequently reported, increase of the magnetization at lower temperature is due to impurities. High-field measurements made at 4.2 K on Nd 6Ϫx Dy x Fe 12.7 Ga 1.3 compounds with xϭ0.0, 0.2, 0.5, and 1.0 show that the R-Fe coupling is not yet broken at 35 T. A large hysteresis in the field dependence of the magnetization is present in all compounds including La 6 Fe 11 Al 3 , indicating the role of the Fe-sublattice anisotropy. A theoretical model for the field dependence of the magnetization is constructed, based on local minimization of the free energy. By taking into account the second-and fourth-order magnetocrystalline anisotropy terms, the magnetization behavior of the compounds, including the large hysteresis, can be explained excellently. A structure of ferromagnetically ordered Fe sheets coupling antiferromagnetically to each other is proposed to explain the experimental data. The hydrides of these compounds are all ferromagnetic ͑light R) or ferrimagnetic ͑heavy R) and have an easy magnetization direction along the c axis due to the Fe-sublattice anisotropy. Their ordering temperatures are near 450 K, just slightly above the Néel temperature of the parent compounds, which can be understood from the proposed spin structure.

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Section: Methodssupporting

confidence: 93%

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
View full text Add to dashboard Cite

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“…Metal hydrides can show disordered and ordered arrangements of hydrogen sublattices, depending on the hydrogen concentration and temperature. Formation of dislocations due to lattice coherency stresses in multi-phase regions exceeding the critical yield stress is another important reason for modified material properties [7].…”

Section: Introduction: Hydrogen Absorption In Metals-bulk Versus Thinmentioning

confidence: 99%

Hydrogen Absorption in Metal Thin Films and Heterostructures Investigated in Situ with Neutron and X-ray Scattering

Callori

Rehm

Causer

et al. 2016

Metals

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Due to hydrogen possessing a relatively large neutron scattering length, hydrogen absorption and desorption behaviors in metal thin films can straightforwardly be investigated by neutron reflectometry. However, to further elucidate the chemical structure of the hydrogen absorbing materials, complementary techniques such as high resolution X-ray reflectometry and diffraction remain important too. Examples of work on such systems include Nb-and Pd-based multilayers, where Nb and Pd both have strong affinity to hydrogen. W/Nb and Fe/Nb multilayers were measured in situ with unpolarized and polarized neutron reflectometry under hydrogen gas charging conditions. The gas-pressure/hydrogen-concentration dependence, the hydrogen-induced macroscopic film swelling as well as the increase in crystal lattice plane distances of the films were determined. Ferromagnetic-Co/Pd multilayers were studied with polarized neutron reflectometry and in situ ferromagnetic resonance measurements to understand the effect of hydrogen absorption on the magnetic properties of the system. This electronic effect enables a novel approach for hydrogen sensing using a magnetic readout scheme.

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“…For supercells Pd"H (n = 1,4,8,16,32) previously reported results are reanalyzed and corrected based on a recently noticed simpli6cation in the computational method. Results are presented for supercells Nb"H (n = 1,2,4,8,16 (4) 0.000 0.003 (5) (6) …”

mentioning

confidence: 99%

Range of forces on host-metal atoms around interstitial hydrogen in Pd and Nb

et al. 1994

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Forces on the host-metal atoms surrounding a hydrogen atom at different interstitial positions in palladium and niobium are calculated from Srst principles in the local-density approximation with a mixed-basis pseudopotential supercell approach. For supercells Pd"H (n = 1,4,8,16,32) previously reported results are reanalyzed and corrected based on a recently noticed simpli6cation in the computational method. Results are presented for supercells Nb"H (n = 1,2,4,8,16

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Lattice strains due to hydrogen in metals

Cited by 166 publications

References 48 publications

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
View full text Add to dashboard Cite

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
View full text Add to dashboard Cite

Hydrogen Absorption in Metal Thin Films and Heterostructures Investigated in Situ with Neutron and X-ray Scattering

Range of forces on host-metal atoms around interstitial hydrogen in Pd and Nb

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Lattice strains due to hydrogen in metals

Cited by 166 publications

References 48 publications

Magnetic properties ofR6Fe13−xM1+xGroot1, Buschow2, Boer3 1998Phys. Rev. B515200View full textAdd to dashboardCite

Magnetic properties ofR6Fe13−xM1+xGroot1, Buschow2, Boer3 1998Phys. Rev. B515200View full textAdd to dashboardCite

Hydrogen Absorption in Metal Thin Films and Heterostructures Investigated in Situ with Neutron and X-ray Scattering

Range of forces on host-metal atoms around interstitial hydrogen in Pd and Nb

Contact Info

Product

Resources

About

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
View full text Add to dashboard Cite

Magnetic properties ofR6Fe13−xM1+x
Groot
¹
,
Buschow
²
,
Boer
³

1998
Phys. Rev. B
51
5
20
0
View full text Add to dashboard Cite