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Combined Bottom-Up ...
Combined Bottom-Up and Top-Down Approach for Highly Ordered One-Dimensional Composite Nanostructures for Spin Insulatronics
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- Datt, Gopal (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Kotnana, Ganesh (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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- Maddu, Ramu (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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- Vallin, Örjan, 1969- (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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- Joshi, Deep C. (författare)
- Uppsala universitet,Institutionen för materialvetenskap
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- Peddis, Davide (författare)
- Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy.;Italian Natl Res Council CNR, Inst Struct Matter, I-00015 Rome, Italy.
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- Barucca, Gianni (författare)
- Univ Politecn Marche, Dept SIMAU, I-60131 Ancona, Italy.
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- Kamalakar, M. Venkata (författare)
- Uppsala universitet,Institutionen för fysik och astronomi
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- Sarkar, Tapati (författare)
- Uppsala universitet,Fasta tillståndets fysik
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(creator_code:org_t)
- 2021-07-30
- 2021
- Engelska.
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Ingår i: ACS Applied Materials and Interfaces. - : American Chemical Society (ACS). - 1944-8244 .- 1944-8252. ; 13:31, s. 37490-37499
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Abstract
Ämnesord
Stäng
- Engineering magnetic proximity effects-based devices requires developing efficient magnetic insulators. In particular, insulators, where magnetic phases show dramatic changes in texture on the nanometric level, could allow us to tune the proximity-induced exchange splitting at such distances. In this paper, we report the fabrication and characterization of highly ordered two-dimensional arrays of LaFeO3 (LFO)-CoFe2O4 (CFO) biphasic magnetic nanowires, grown on silicon substrates using a unique combination of bottom-up and top-down synthesis approaches. The regularity of the patterns was confirmed using atomic force microscopy and scanning electron microscopy techniques, whereas magnetic force microscopy images established the magnetic homogeneity of the patterned nanowires and absence of any magnetic debris between the wires. Transmission electron microscopy shows a close spatial correlation between the LFO and CFO phases, indicating strong grain-to-grain interfacial coupling, intrinsically different from the usual core-shell structures. Magnetic hysteresis loops reveal the ferrimagnetic nature of the composites up to room temperature and the presence of a strong magnetic coupling between the two phases, and electrical transport measurements demonstrate the strong insulating behavior of the LFO-CFO composite, which is found to be governed by Mottvariable range hopping conduction mechanisms. A shift in the Raman modes in the composite sample compared to those of pure CFO suggests the existence of strain-mediated elastic coupling between the two phases in the composite sample. Our work offers ordered composite nanowires with strong interfacial coupling between the two phases that can be directly integrated for developing multiphase spin insulatronic devices and emergent magnetic interfaces.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- one-dimensional nanostructures
- bimagnetic nanocomposites
- spin insulatronics
- oxide electronics
- strain coupling
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Datt, Gopal
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Kotnana, Ganesh
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Maddu, Ramu
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Vallin, Örjan, 1 ...
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Joshi, Deep C.
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Peddis, Davide
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visa fler...
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Barucca, Gianni
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Kamalakar, M. Ve ...
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Sarkar, Tapati
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visa färre...
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- NATURVETENSKAP
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Uppsala universitet