We have systematically investigated the magnetization reversal characteristics and magnetoresistance of continuous and nanoporous [Co/Pd]-IrMn multilayered thin films with perpendicular magnetic anisotropy at different temperatures (4-300 K). For their nanostructuring, porosity was induced by means of deposition onto templates of anodized titania with small (∼30 nm in diameter) homogeneously distributed pores. The magnetization reversal and magnetoresistance of the porous films were found to be closely related to the splitting of the ferromagnetic material into regions with different magnetic properties, in correlation with the complex morphology of the porous system. Independent magnetization reversal is detected for these regions, and is accompanied by its strong impact on the magnetic order in the capping IrMn layer. Electron-magnon scattering is found to be a dominant mechanism of magnetoresistance, determining its almost linear field dependence in a high magnetic field and contributing to its magnetoresistance behavior, similar to magnetization reversal, in a low magnetic field. Partial rotation of IrMn magnetic moments, consistent with the magnetization reversal of the ferromagnet, is proposed as an explanation for the two-state resistance behavior observed in switching between high-resistive and low-resistive values at the magnetization reversal of the porous system studied.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c9cp05947d | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rare association of posterior reversible encephalopathy syndrome (PRES) with hemolysis, elevated liver enzymes and low platelets (HELLP) syndrome - A case report and review of the literature.
Heliyon
December 2024
Neurology Clinic, University Clinical Center of Serbia, Belgrade, Serbia.
Introduction: The hemolysis-elevated liver enzymes-low platelet counts (HELLP) syndrome and posterior reversible encephalopathy syndrome (PRES) are rare conditions that can complicate pregnancy and the early postpartum period. Although both are closely related to hypertensive pregnancy disorders, their association is rarely described, so the outcome of these patients remains unknown. We present a case report of PRES associated with HELLP syndrome and a review of all previously published cases, including demographic characteristics, clinical presentation, treatment, and outcome.
View Article and Find Full Text PDFAssociation between left ventricular reverse remodelling and the B-type natriuretic peptide-cGMP cascade after anterior acute myocardial infarction.
Open Heart
January 2025
Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
Background: The role of cyclic guanosine 3',5'-monophosphate (cGMP) after acute myocardial infarction (AMI) is not well understood despite its significance as a second messenger of natriuretic peptides (NPs) in cardiovascular disease. We investigated the association between the NP-cGMP cascade and left ventricular reverse remodelling (LVRR) in anterior AMI.
Methods: 67 patients with their first anterior AMI (median age, 64 years; male, 76%) underwent prospective evaluation of plasma concentrations of the molecular forms of A-type and B-type natriuretic peptide (BNP) and cGMP from immediately after primary percutaneous coronary intervention (PPCI) to 10 months post-AMI.
Transcription factor AP-2 Beta, a potential target of repetitive Transspinal magnetic stimulation in spinal cord injury treatment, reduced inflammation and alleviated spinal cord injury.
Exp Neurol
January 2025
Department of Rehabilitation Medicine, The First Hospital of China Medical University, Shenyang, China. Electronic address:
Spinal cord injury (SCI) is a neurodegenerative disease, with a high disability rate. According to the results of mRNA-seq, transcription factor AP-2 Beta (TFAP2B) is a potential target of repetitive Transspinal Magnetic Stimulation (rTSMS) in SCI treatment. Our results demonstrated that rTSMS significantly improved motor function and promoted neuronal survival post-SCI.
View Article and Find Full Text PDFMagnetic graphene-enhanced exonuclease III assisted amplification strategy driven carbon nanozyme for tri-mode detection of Escherichia coli O157:H7.
Food Chem
January 2025
School of Food and Biological Engineering, Key Laboratory for Animal Food Green Manufacturing and Resource Mining of Anhui Province, Engineering Research Center of Bio-Process, Ministry of Education, Hefei University of Technology, Hefei 230009, China. Electronic address:
Ultra-precision point-of-care detection of Escherichia coli O157:H7 in foods is an important issue. Here, the detection sensitivity was improved by a signal cascade amplification strategy synergised by exonuclease III assisted isothermal amplification and reverse magnetic strategy. The double-stranded DNA formed by the aptamer and the target DNA as a sensing switch, avoiding the complex process of specific nucleic acid extraction.
View Article and Find Full Text PDFRecovery of Myocardial Functions After Kidney Transplantation in Patients with Heart Failure Due to Uremic Cardiomyopathy.
Turk Kardiyol Dern Ars
January 2025
Department of Cardiology, Istanbul Basaksehir Cam and Sakura City Hospital, Basaksehir, Istanbul, Türkiye.
Objective: Although left ventricular hypertrophy frequently accompanies end-stage renal disease, heart failure (HF) with reduced ejection fraction (EF) is also observed in a subset of patients. In those patients kidney transplantation (KT) is generally avoided due to an increased risk of mortality in addition to the risks associated with HF. This prospective study was designed to follow patients with HF who were being prepared for KT.
View Article and Find Full Text PDFWant 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!