Strain driven phase transition and mechanism for Fe/Ir(111) films

Abstract By way of introducing heterogeneous interfaces, the stabilization of crystallographic phases is critical to a viable strategy for developing materials with novel characteristics, such as occurrence of new structure phase, anomalous enhancement in magnetic moment, enhancement of efficiency a...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Chen-Yuan Hsieh, Pei-Cheng Jiang, Wei-Hsiang Chen, Jyh-Shen Tsay
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b1a97dfe56e940fb996440acee1ebbdb
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b1a97dfe56e940fb996440acee1ebbdb
record_format	dspace
spelling	oai:doaj.org-article:b1a97dfe56e940fb996440acee1ebbdb2021-11-14T12:18:08ZStrain driven phase transition and mechanism for Fe/Ir(111) films10.1038/s41598-021-01474-12045-2322https://doaj.org/article/b1a97dfe56e940fb996440acee1ebbdb2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01474-1https://doaj.org/toc/2045-2322Abstract By way of introducing heterogeneous interfaces, the stabilization of crystallographic phases is critical to a viable strategy for developing materials with novel characteristics, such as occurrence of new structure phase, anomalous enhancement in magnetic moment, enhancement of efficiency as nanoportals. Because of the different lattice structures at the interface, heterogeneous interfaces serve as a platform for controlling pseudomorphic growth, nanostructure evolution and formation of strained clusters. However, our knowledge related to the strain accumulation phenomenon in ultrathin Fe layers on face-centered cubic (fcc) substrates remains limited. For Fe deposited on Ir(111), here we found the existence of strain accumulation at the interface and demonstrate a strain driven phase transition in which fcc-Fe is transformed to a bcc phase. By substituting the bulk modulus and the shear modulus and the experimental results of lattice parameters in cubic geometry, we obtain the strain energy density for different Fe thicknesses. A limited distortion mechanism is proposed for correlating the increasing interfacial strain energy, the surface energy, and a critical thickness. The calculation shows that the strained layers undergo a phase transition to the bulk structure above the critical thickness. The results are well consistent with experimental measurements. The strain driven phase transition and mechanism presented herein provide a fundamental understanding of strain accumulation at the bcc/fcc interface.Chen-Yuan HsiehPei-Cheng JiangWei-Hsiang ChenJyh-Shen TsayNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chen-Yuan Hsieh Pei-Cheng Jiang Wei-Hsiang Chen Jyh-Shen Tsay Strain driven phase transition and mechanism for Fe/Ir(111) films
description	Abstract By way of introducing heterogeneous interfaces, the stabilization of crystallographic phases is critical to a viable strategy for developing materials with novel characteristics, such as occurrence of new structure phase, anomalous enhancement in magnetic moment, enhancement of efficiency as nanoportals. Because of the different lattice structures at the interface, heterogeneous interfaces serve as a platform for controlling pseudomorphic growth, nanostructure evolution and formation of strained clusters. However, our knowledge related to the strain accumulation phenomenon in ultrathin Fe layers on face-centered cubic (fcc) substrates remains limited. For Fe deposited on Ir(111), here we found the existence of strain accumulation at the interface and demonstrate a strain driven phase transition in which fcc-Fe is transformed to a bcc phase. By substituting the bulk modulus and the shear modulus and the experimental results of lattice parameters in cubic geometry, we obtain the strain energy density for different Fe thicknesses. A limited distortion mechanism is proposed for correlating the increasing interfacial strain energy, the surface energy, and a critical thickness. The calculation shows that the strained layers undergo a phase transition to the bulk structure above the critical thickness. The results are well consistent with experimental measurements. The strain driven phase transition and mechanism presented herein provide a fundamental understanding of strain accumulation at the bcc/fcc interface.
format	article
author	Chen-Yuan Hsieh Pei-Cheng Jiang Wei-Hsiang Chen Jyh-Shen Tsay
author_facet	Chen-Yuan Hsieh Pei-Cheng Jiang Wei-Hsiang Chen Jyh-Shen Tsay
author_sort	Chen-Yuan Hsieh
title	Strain driven phase transition and mechanism for Fe/Ir(111) films
title_short	Strain driven phase transition and mechanism for Fe/Ir(111) films
title_full	Strain driven phase transition and mechanism for Fe/Ir(111) films
title_fullStr	Strain driven phase transition and mechanism for Fe/Ir(111) films
title_full_unstemmed	Strain driven phase transition and mechanism for Fe/Ir(111) films
title_sort	strain driven phase transition and mechanism for fe/ir(111) films
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b1a97dfe56e940fb996440acee1ebbdb
work_keys_str_mv	AT chenyuanhsieh straindrivenphasetransitionandmechanismforfeir111films AT peichengjiang straindrivenphasetransitionandmechanismforfeir111films AT weihsiangchen straindrivenphasetransitionandmechanismforfeir111films AT jyhshentsay straindrivenphasetransitionandmechanismforfeir111films
_version_	1718429307888467968

Strain driven phase transition and mechanism for Fe/Ir(111) films

Ejemplares similares