A Telephone Without Magnetism

Magnetocapacitance without magnetism.

A substantial magnetodielectric effect is often an indication of coupled magnetic and elastic order, such as is found in the multi-ferroics. However, it has recently been shown that magnetism is not necessary to produce either a magnetoresistance or a magnetocapacitance when the material is inhomogeneous. Here, we will investigate the characteristic magnetic-field-dependent dielectric response ...

Magnetism without magnetic ions: percolation, exchange, and formation energies of magnetism-promoting intrinsic defects in CaO.

We investigate theoretically the prospects of ferromagnetism being induced by cation vacancies in nonmagnetic oxides. A single Ca vacancy V(0)(Ca) has a magnetic moment due to its open-shell structure but the ferromagnetic interaction between two vacancies extends only to four neighbors or less. To achieve magnetic percolation on a fcc lattice with such an interaction range one needs a minimum ...

High temperature superconductivity from the two-dimensional semiconductors without magnetism

We examine the possibility of high temperature superconductivity from two-dimensional semiconductor without antiferromagnetic fluctuations. The weak coupling BCS theory is applied, especially where the Fermi level is near the bottom of the conduction band. Due to screening, the attractive interaction is local in k-space. The density of states(DOS) does not have a peak near the bottom of the ban...

Magnetism without magnetic impurities in oxides ZrO2 and TiO2

Discharge Against Medical Advice in Teaching Hospitals: A Telephone Survey

Background: Discharge with personal consent is considered as one of the main problems in hospitalization condition since many patients leave the hospital prematurely against the doctor’s advice. Thus, the aim of this study was to identify the factors affecting the discharge with personal satisfaction in selected teaching hospitals of Tehran University of Medical Sciences. Methods: The pr...