An investigation of a symmetrical arrangement of N quasi-two-dimensional magnetic domains in an external field is carried out. By minimizing the linearized interaction energy for this arrangement using a nearest-neighbor approximation, an orientationally preferred state of the system is found. This orientational preference leads to a large degree of predictability in the final patterns as demonstrated by some experiments using ferrofluids. The final state patterns are also investigated by carrying out a series of numerical simulations. These simulations exhibit a similar predictability and the final patterns bear a strong resemblance to those obtained experimentally.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.68.035301 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Temperature Dependence on Microstructure, Crystallization Orientation, and Piezoelectric Properties of ZnO Films.
Sensors (Basel)
January 2025
State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
This study has investigated the effects of different annealing temperatures on the microstructure, chemical composition, phase structure, and piezoelectric properties of ZnO films. The analysis focuses on how annealing temperature influences the oxygen content and the preferred c-axis (002) orientation of the films. It was found that annealing significantly increases the grain size and optimizes the columnar crystal structure, though excessive high-temperature annealing leads to structural degradation.
View Article and Find Full Text PDFAll-perovskite tandem solar cells achieving >29% efficiency with improved (100) orientation in wide-bandgap perovskites.
Nat Mater
January 2025
National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, College of Engineering and Applied Sciences, Frontiers Science Center for Critical Earth Material Cycling, Nanjing University, Nanjing, China.
Monolithic all-perovskite tandem solar cells present a promising approach for exceeding the efficiency limit of single-junction solar cells. However, the substantial open-circuit voltage loss in the wide-bandgap perovskite subcell hinders further improvements in power-conversion efficiency. Here we develop wide-bandgap perovskite films with improved (100) crystal orientation that suppress non-radiative recombination.
View Article and Find Full Text PDFA minimal vertex model explains how the amnioserosa avoids fluidization during dorsal closure.
Proc Natl Acad Sci U S A
January 2025
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104.
Dorsal closure is a process that occurs during embryogenesis of . During dorsal closure, the amnioserosa (AS), a one-cell thick epithelial tissue that fills the dorsal opening, shrinks as the lateral epidermis sheets converge and eventually merge. During this process, both shape index and aspect ratio of amnioserosa cells increase markedly.
View Article and Find Full Text PDFInstruments for Value Elucidation in Older Adults in Clinical Practice-A Scoping Review.
J Am Geriatr Soc
January 2025
Cancer Center Amsterdam, Cancer Treatment and Quality of Life, Amsterdam, The Netherlands.
Background: To ensure appropriate care for the individual older adult, an ideal treatment should align with patients' values. However, healthcare professionals struggle with how to elucidate patient values effectively. To offer guidance to healthcare professionals, we performed a scoping review, thereby mapping and categorizing instruments specifically developed to elucidate values of older adults in clinical practice.
View Article and Find Full Text PDFComparative Evaluation of Consumer Wearable Devices for Atrial Fibrillation Detection: Validation Study.
JMIR Form Res
January 2025
Limburg Clinical Research Center/Mobile Health Unit, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium.
Background: Consumer-oriented wearable devices (CWDs) such as smartphones and smartwatches have gained prominence for their ability to detect atrial fibrillation (AF) through proprietary algorithms using electrocardiography or photoplethysmography (PPG)-based digital recordings. Despite numerous individual validation studies, a direct comparison of interdevice performance is lacking.
Objective: This study aimed to evaluate and compare the ability of CWDs to distinguish between sinus rhythm and AF.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!