Self-Patterning of Epitaxial Ni-Mn-Ga/MgO(001) Thin Films

I. R. Aseguinolaza; V. Golub; O. Y. Salyuk; B. Muntifering; W. B. Knowlton; P. Müllner; J. M. Barandiarán; V. A. Chernenko

doi:10.1016/j.actamat.2016.03.065

Self-Patterning of Epitaxial Ni-Mn-Ga/MgO(001) Thin Films

I. R. Aseguinolaza, V. Golub, O. Y. Salyuk, B. Muntifering, W. B. Knowlton, P. Müllner, J. M. Barandiarán, V. A. Chernenko

Micron School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

In this work, a detailed report on the growth of elongated bar-like crystallites with a definite crystallographic orientation, forming a self-organized patterned surface layer, with a thickness of about 100 nm, onto 900 nm thick ferromagnetic shape memory alloy Ni-Mn-Ga films epitaxially grown on MgO(001) is presented. The phenomenon appears above a threshold of lattice mismatch (≈2%) between the film and substrate. The structural, magnetic and transformation properties of such films are described and analyzed. Particularly, the different magnetic states of the two film layers are discerned by ferromagnetic resonance. The feasibility of creating a ferromagnetic shape memory alloy with a nanoscale self-patterned surface, during the very same process of film deposition, can be interesting for potential applications where control of the surface architecture would be needed.

Original language	American English
Pages (from-to)	194-201
Number of pages	8
Journal	Acta Materialia
Volume	111
DOIs	https://doi.org/10.1016/j.actamat.2016.03.065
State	Published - 1 Jun 2016

Keywords

Ferromagnetic resonance
Martensitic transformation
Ni-Mn-Ga/MgO(001) thin films composites
Surface self-patterning

EGS Disciplines

Materials Science and Engineering

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10.1016/j.actamat.2016.03.065

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title = "Self-Patterning of Epitaxial Ni-Mn-Ga/MgO(001) Thin Films",

abstract = "In this work, a detailed report on the growth of elongated bar-like crystallites with a definite crystallographic orientation, forming a self-organized patterned surface layer, with a thickness of about 100 nm, onto 900 nm thick ferromagnetic shape memory alloy Ni-Mn-Ga films epitaxially grown on MgO(001) is presented. The phenomenon appears above a threshold of lattice mismatch (≈2%) between the film and substrate. The structural, magnetic and transformation properties of such films are described and analyzed. Particularly, the different magnetic states of the two film layers are discerned by ferromagnetic resonance. The feasibility of creating a ferromagnetic shape memory alloy with a nanoscale self-patterned surface, during the very same process of film deposition, can be interesting for potential applications where control of the surface architecture would be needed.",

keywords = "Ferromagnetic resonance, Martensitic transformation, Ni-Mn-Ga/MgO(001) thin films composites, Surface self-patterning",

author = "Aseguinolaza, {I. R.} and V. Golub and Salyuk, {O. Y.} and B. Muntifering and Knowlton, {W. B.} and P. M{\"u}llner and Barandiar{\'a}n, {J. M.} and Chernenko, {V. A.}",

note = "Publisher Copyright: {\textcopyright} 2016 Acta Materialia Inc.",

year = "2016",

month = jun,

day = "1",

doi = "10.1016/j.actamat.2016.03.065",

language = "American English",

volume = "111",

pages = "194--201",

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TY - JOUR

T1 - Self-Patterning of Epitaxial Ni-Mn-Ga/MgO(001) Thin Films

AU - Aseguinolaza, I. R.

AU - Golub, V.

AU - Salyuk, O. Y.

AU - Muntifering, B.

AU - Knowlton, W. B.

AU - Müllner, P.

AU - Barandiarán, J. M.

AU - Chernenko, V. A.

PY - 2016/6/1

Y1 - 2016/6/1

N2 - In this work, a detailed report on the growth of elongated bar-like crystallites with a definite crystallographic orientation, forming a self-organized patterned surface layer, with a thickness of about 100 nm, onto 900 nm thick ferromagnetic shape memory alloy Ni-Mn-Ga films epitaxially grown on MgO(001) is presented. The phenomenon appears above a threshold of lattice mismatch (≈2%) between the film and substrate. The structural, magnetic and transformation properties of such films are described and analyzed. Particularly, the different magnetic states of the two film layers are discerned by ferromagnetic resonance. The feasibility of creating a ferromagnetic shape memory alloy with a nanoscale self-patterned surface, during the very same process of film deposition, can be interesting for potential applications where control of the surface architecture would be needed.

AB - In this work, a detailed report on the growth of elongated bar-like crystallites with a definite crystallographic orientation, forming a self-organized patterned surface layer, with a thickness of about 100 nm, onto 900 nm thick ferromagnetic shape memory alloy Ni-Mn-Ga films epitaxially grown on MgO(001) is presented. The phenomenon appears above a threshold of lattice mismatch (≈2%) between the film and substrate. The structural, magnetic and transformation properties of such films are described and analyzed. Particularly, the different magnetic states of the two film layers are discerned by ferromagnetic resonance. The feasibility of creating a ferromagnetic shape memory alloy with a nanoscale self-patterned surface, during the very same process of film deposition, can be interesting for potential applications where control of the surface architecture would be needed.

KW - Ferromagnetic resonance

KW - Martensitic transformation

KW - Ni-Mn-Ga/MgO(001) thin films composites

KW - Surface self-patterning

UR - http://www.scopus.com/inward/record.url?scp=84962772598&partnerID=8YFLogxK

UR - https://scholarworks.boisestate.edu/mse_facpubs/264

U2 - 10.1016/j.actamat.2016.03.065

DO - 10.1016/j.actamat.2016.03.065

M3 - Article

SN - 1359-6454

VL - 111

SP - 194

EP - 201

JO - Acta Materialia

JF - Acta Materialia

ER -

Self-Patterning of Epitaxial Ni-Mn-Ga/MgO(001) Thin Films

Abstract

Keywords

EGS Disciplines

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