Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy
- Autores
- Saccone, Fabio Daniel; Rodríguez Torres, Claudia Elena; Sánchez, Francisco Homero; Fernández van Raap, Marcela Beatriz
- Año de publicación
- 2001
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- RE₂Fe₁₄B (RE=rare earth) materials are capable of absorbing hydrogen to form a stable solid solution at room temperature. Hydrogenation produces a number of significant changes in the hyperfine interactions. In this work, 57Fe Mossbauer effect spectroscopy and X-ray diffraction measurements were performed on Nd₁₄.₀₁Hf₀.₀₈Fe₇₈.₉₁B₇.₀₀ alloys submitted to thermal treatment in hydrogen atmosphere. A non-linear increase of the hyperfine fields and isomer shifts with hydrogen concentration was observed. The hyperfine parameters of the 8j₁ site exhibit a rather different evolution than those experienced by the other major sites (8j₂, 16k₁, 16k₂). The origin of the hyperfine field enhancement is analyzed in terms of volume expansion and H nearest neighbors to the Fe sites. A linear expression on these two effects to give account of isomer shift evolution for 8j₁ site is given.
Facultad de Ciencias Exactas - Materia
-
Física
Mössbauer spectroscopy
X-ray diffraction - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/142778
Ver los metadatos del registro completo
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Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloySaccone, Fabio DanielRodríguez Torres, Claudia ElenaSánchez, Francisco HomeroFernández van Raap, Marcela BeatrizFísicaMössbauer spectroscopyX-ray diffractionRE₂Fe₁₄B (RE=rare earth) materials are capable of absorbing hydrogen to form a stable solid solution at room temperature. Hydrogenation produces a number of significant changes in the hyperfine interactions. In this work, 57Fe Mossbauer effect spectroscopy and X-ray diffraction measurements were performed on Nd₁₄.₀₁Hf₀.₀₈Fe₇₈.₉₁B₇.₀₀ alloys submitted to thermal treatment in hydrogen atmosphere. A non-linear increase of the hyperfine fields and isomer shifts with hydrogen concentration was observed. The hyperfine parameters of the 8j₁ site exhibit a rather different evolution than those experienced by the other major sites (8j₂, 16k₁, 16k₂). The origin of the hyperfine field enhancement is analyzed in terms of volume expansion and H nearest neighbors to the Fe sites. A linear expression on these two effects to give account of isomer shift evolution for 8j₁ site is given.Facultad de Ciencias Exactas2001info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf123-129http://sedici.unlp.edu.ar/handle/10915/142778spainfo:eu-repo/semantics/altIdentifier/issn/0304-3843info:eu-repo/semantics/altIdentifier/issn/1572-9540info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1013878315620info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:24:24Zoai:sedici.unlp.edu.ar:10915/142778Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:24:25.037SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| title |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| spellingShingle |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy Saccone, Fabio Daniel Física Mössbauer spectroscopy X-ray diffraction |
| title_short |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| title_full |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| title_fullStr |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| title_full_unstemmed |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| title_sort |
Hyperfine field and isomer shift evolution in hydrogenated Nd-Fe-B alloy |
| dc.creator.none.fl_str_mv |
Saccone, Fabio Daniel Rodríguez Torres, Claudia Elena Sánchez, Francisco Homero Fernández van Raap, Marcela Beatriz |
| author |
Saccone, Fabio Daniel |
| author_facet |
Saccone, Fabio Daniel Rodríguez Torres, Claudia Elena Sánchez, Francisco Homero Fernández van Raap, Marcela Beatriz |
| author_role |
author |
| author2 |
Rodríguez Torres, Claudia Elena Sánchez, Francisco Homero Fernández van Raap, Marcela Beatriz |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Física Mössbauer spectroscopy X-ray diffraction |
| topic |
Física Mössbauer spectroscopy X-ray diffraction |
| dc.description.none.fl_txt_mv |
RE₂Fe₁₄B (RE=rare earth) materials are capable of absorbing hydrogen to form a stable solid solution at room temperature. Hydrogenation produces a number of significant changes in the hyperfine interactions. In this work, 57Fe Mossbauer effect spectroscopy and X-ray diffraction measurements were performed on Nd₁₄.₀₁Hf₀.₀₈Fe₇₈.₉₁B₇.₀₀ alloys submitted to thermal treatment in hydrogen atmosphere. A non-linear increase of the hyperfine fields and isomer shifts with hydrogen concentration was observed. The hyperfine parameters of the 8j₁ site exhibit a rather different evolution than those experienced by the other major sites (8j₂, 16k₁, 16k₂). The origin of the hyperfine field enhancement is analyzed in terms of volume expansion and H nearest neighbors to the Fe sites. A linear expression on these two effects to give account of isomer shift evolution for 8j₁ site is given. Facultad de Ciencias Exactas |
| description |
RE₂Fe₁₄B (RE=rare earth) materials are capable of absorbing hydrogen to form a stable solid solution at room temperature. Hydrogenation produces a number of significant changes in the hyperfine interactions. In this work, 57Fe Mossbauer effect spectroscopy and X-ray diffraction measurements were performed on Nd₁₄.₀₁Hf₀.₀₈Fe₇₈.₉₁B₇.₀₀ alloys submitted to thermal treatment in hydrogen atmosphere. A non-linear increase of the hyperfine fields and isomer shifts with hydrogen concentration was observed. The hyperfine parameters of the 8j₁ site exhibit a rather different evolution than those experienced by the other major sites (8j₂, 16k₁, 16k₂). The origin of the hyperfine field enhancement is analyzed in terms of volume expansion and H nearest neighbors to the Fe sites. A linear expression on these two effects to give account of isomer shift evolution for 8j₁ site is given. |
| publishDate |
2001 |
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2001 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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http://sedici.unlp.edu.ar/handle/10915/142778 |
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http://sedici.unlp.edu.ar/handle/10915/142778 |
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spa |
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info:eu-repo/semantics/altIdentifier/issn/0304-3843 info:eu-repo/semantics/altIdentifier/issn/1572-9540 info:eu-repo/semantics/altIdentifier/doi/10.1023/a:1013878315620 |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
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