KIT | KIT-Bibliothek | Impressum | Datenschutz

Ion-irradiation-assisted tuning of phase transformations and physical properties in single crystalline Fe₇Pd₃ ferromagnetic shape memory alloy thin films

Arabi-Hashemi, A.; Witte, R. 1; Lotnyk, A.; Brand, R. A. 1; Setzer, A.; Esquinazi, P.; Hahn, H. 1; Averback, R. S.; Mayr, S. G.
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)


Control of multi-martensite phase transformations and physical properties constitute greatly unresolved challenges in Fe7Pd3-based ferromagnetic shape memory alloys. Single crystalline Fe7Pd3 thin films reveal an austenite to martensite phase transformation, continuously ranging from the facecentered cubic (fcc) to the face-centered tetragonal (fct) and body-centered cubic (bcc) phases upon irradiation with 1.8 MeV Kr+ ions. Within the present contribution, we explore this scenario within a comprehensive experimental study: employing atomic force microscopy (AFM) and high resolution transmission electron microscopy (HR-TEM), we first clarify the crystallography of the ionirradiation-induced austenite⇒martensite and inter-martensite transitions, explore the multivariant martensite structures with c-a twinning and unravel a very gradual transition between variants at twin boundaries. Accompanying magnetic properties, addressed locally and globally, are characterized by an increasing saturation magnetization from fcc to bcc, while coercivity and remanence are demonstrated to be governed by magnetocrystalline anisotropy and ion-irradiationinduced defect density, respectively. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/110101190
Veröffentlicht am 23.10.2018
DOI: 10.1088/1367-2630/17/5/053029
Zitationen: 9
Web of Science
Zitationen: 8
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2015
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen-ID: 110101190
HGF-Programm 43.22.01 (POF III, LK 01) Functionality by Design
Erschienen in New journal of physics
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 17
Seiten 053029/1-14
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page