scholarly journals Intrinsic and extrinsic conduction contributions at nominally neutral domain walls in hexagonal manganites

2020 ◽  
Vol 116 (26) ◽  
pp. 262903
Author(s):  
J. Schultheiß ◽  
J. Schaab ◽  
D. R. Småbråten ◽  
S. H. Skjærvø ◽  
E. Bourret ◽  
...  
Keyword(s):  
Domain Walls ◽  
Hexagonal Manganites

scholarly journals Measuring Ferroelectric Order Parameters at Domain Walls and Vortices in Hexagonal Manganites with Atomic Resolution STEM

2017 ◽  
Vol 23 (S1) ◽  
pp. 1636-1637
Author(s):  
Megan E. Holtz ◽  
Konstantin Shapovalov ◽  
Julia A. Mundy ◽  
Celesta S. Chang ◽  
Dennis Meier ◽  
...  
Keyword(s):  
Domain Walls ◽  
Order Parameters ◽  
Atomic Resolution ◽  
Hexagonal Manganites ◽  
Ferroelectric Order

Visualization of large-scale charged domain Walls in hexagonal manganites

2021 ◽  
Vol 118 (7) ◽  
pp. 072901
Author(s):  
Fei Fan ◽  
Ziyan Gao ◽  
Louis Ponet ◽  
Jing Wang ◽  
Houbing Huang ◽  
...  
Keyword(s):  
Large Scale ◽  
Domain Walls ◽  
Hexagonal Manganites

scholarly journals Phase engineering in oxides by interfaces

2012 ◽  
Vol 370 (1977) ◽  
pp. 4972-4988 ◽  
Author(s):  
Manfred Fiebig
Keyword(s):  
Domain Walls ◽  
Second Harmonic ◽  
Piezoresponse Force Microscopy ◽  
Bulk Crystals ◽  
Oxide Interface ◽  
Force Microscopy ◽  
Hexagonal Manganites ◽  
Phase Engineering ◽  
Protected Domain ◽  
Antiferromagnetic Domains

Optical second harmonic generation and piezoresponse force microscopy are used to investigate manifestations of ordered states directly related to the presence of an oxide interface. Three examples, each with a very different scope, are reviewed in order to highlight the richness of interface-related phenomena in oxides. (i) The orbital states involved in the emergence of an interfacial conducting state in LaAlO 3 /SrTiO 3 heterostructures are investigated, which reveal a surprising decoupling of orbital and transport properties; (ii) the distribution of ferroelectric and antiferromagnetic domains in epitaxial films of the multiferroic hexagonal manganites is investigated, which reveals striking differences to the corresponding bulk crystals; and (iii) the distribution of trimerization–polarization domains in the hexagonal manganites is investigated, which reveals the presence of topologically protected domain walls with properties different from the bulk.

scholarly journals FIB lift-out of conducting ferroelectric domain walls in hexagonal manganites

2019 ◽  
Vol 115 (12) ◽  
pp. 122901 ◽  
Author(s):  
Aleksander B. Mosberg ◽  
Erik D. Roede ◽  
Donald M. Evans ◽  
Theodor S. Holstad ◽  
Edith Bourret ◽  
...  
Keyword(s):  
Domain Walls ◽  
Ferroelectric Domain ◽  
Hexagonal Manganites

scholarly journals Charged domain walls in improper ferroelectric hexagonal manganites and gallates

2018 ◽  
Vol 2 (11) ◽  
Author(s):  
Didrik R. Småbråten ◽  
Quintin N. Meier ◽  
Sandra H. Skjærvø ◽  
Katherine Inzani ◽  
Dennis Meier ◽  
...  
Keyword(s):  
Domain Walls ◽  
Hexagonal Manganites

The direct determination of magnetic domain wall profiles using a split detector STEM

1978 ◽  
Vol 36 (1) ◽  
pp. 466-467
Author(s):  
J.N. Chapman ◽  
P.E. Batson ◽  
E.M. Waddell ◽  
R.P. Ferrier
Keyword(s):  
Electron Microscope ◽  
Domain Wall ◽  
Transmission Electron Microscope ◽  
Domain Walls ◽  
Photographic Plate ◽  
Magnetic Domain ◽  
Direct Determination ◽  
Quantitative Information ◽  
Scanning Transmission Electron Microscope ◽  
Transmission Electron

By far the most commonly used mode of Lorentz microscopy in the examination of ferromagnetic thin films is the Fresnel or defocus mode. Use of this mode in the conventional transmission electron microscope (CTEM) is straightforward and immediately reveals the existence of all domain walls present. However, if such quantitative information as the domain wall profile is required, the technique suffers from several disadvantages. These include the inability to directly observe fine image detail on the viewing screen because of the stringent illumination coherence requirements, the difficulty of accurately translating part of a photographic plate into quantitative electron intensity data, and, perhaps most severe, the difficulty of interpreting this data. One solution to the first-named problem is to use a CTEM equipped with a field emission gun (FEG) (Inoue, Harada and Yamamoto 1977) whilst a second is to use the equivalent mode of image formation in a scanning transmission electron microscope (STEM) (Chapman, Batson, Waddell, Ferrier and Craven 1977), a technique which largely overcomes the second-named problem as well.

Lorentz microscopy study of magnetic domain walls in Fe-Cr-Co alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 462-463
Author(s):  
Yalcin Belli
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Microscopy Study ◽  
Ferromagnetic Phase ◽  
Stable Phase ◽  
Magnetic Domains ◽  
Lorentz Microscopy ◽  
Magnetic Hardening ◽  
Electron Microscopes ◽  
Co Alloys

Fe-Cr-Co alloys have great technological potential to replace Alnico alloys as hard magnets. The relationship between the microstructures and the magnetic properties has been recently established for some of these alloys. The magnetic hardening has been attributed to the decomposition of the high temperature stable phase (α) into an elongated Fe-rich ferromagnetic phase (α1) and a weakly magnetic or non-magnetic Cr-rich phase (α2). The relationships between magnetic domains and domain walls and these different phases are yet to be understood. The TEM has been used to ascertain the mechanism of magnetic hardening for the first time in these alloys. The present paper describes the magnetic domain structure and the magnetization reversal processes in some of these multiphase materials. Microstructures to change properties resulting from, (i) isothermal aging, (ii) thermomagnetic treatment (TMT) and (iii) TMT + stepaging have been chosen for this investigation. The Jem-7A and Philips EM-301 transmission electron microscopes operating at 100 kV have been used for the Lorentz microscopy study of the magnetic domains and their interactions with the finely dispersed precipitate phases.

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