Dissertation Title : Development of Magnetic Field Sensors Using Bismuth – Substituted Garnets Thin Films with In-Plane Magnetization Iulian Nistor, Ph.D., 2006 Dissertation Directed By: Professor of Engineering Isaak D. Mayergoyz, Electrical and Computer Engineering Department, and Dr. Charles Krafft, Laboratory for Physical Sciences In the dissertation, the use of magnetic single crystal Bism...

An mtroductlon to the theory of the amsotroplc magnetoresistance effect m ferromagnetic thm films IS given, endmg m a treatment of the mmlmahzatlon of the free energy which IS the result of the lntnnslc and extnnslc anlsotroples of the thm-film structure The amsotroplc magnetoreslstance effect m long stnps IS revlewed Attention IS given to problems hke the formation of domains and measures hke ...

InSb films are prepared by a source-temperature-programmed evaporation method and hot-wire recrystalhzatlon lnethod for Hail elements and ma~etor~~stan~ (MR) elements, respecttvely, to reduce nnperfectJons of the crystal structure, and their crystakne and electrical propertles are studied An optimum source-temperature pmgramme 1s mvestlgated and the films thus prepared are used for Hall element...

In this paper we present a review of the application of two types of magnetic sensors-fluxgate magnetometers and nuclear magnetic resonance (NMR) sensors-in the oil/gas industry. These magnetic sensors play a critical role in drilling wells safely, accurately and efficiently into a target reservoir zone by providing directional data of the well and acquiring information about the surrounding ge...

The monitoring of physiological biomarkers is fundamental to the diagnosis and treatment of disease. We describe here the development of molecular sensors which can be read by magnetic resonance (MR) relaxometry. MR is an advantageous bio-sensor readout because it can be determined from opaque samples and through intervening layers of matter. Wash steps can therefore be avoided in in vitro MR a...

The earliest magnetic field detectors allowed navigation over trackless oceans by sensing the earth’s magnetic poles. Magnetic field sensing has vastly expanded as industry has adapted a variety of magnetic sensors to detect the presence, strength, or direction of magnetic fields not only from the earth, but also from permanent magnets, magnetized soft magnets, vehicle disturbances, brain wave ...

Hall-effect (HE) sensors based on high-quality Mn-doped Bi2Te3 topological insulator (TI) thin films have been systematically studied in this paper. Improvement of Hall sensitivity is found after doping the magnetic element Mn into Bi2Te3. The sensors with low Mn concentrations, MnxBi2-xTe3, x = 0.01 and 0.08 show the linear behavior of Hall resistance with sensitivity about 5 Ω/T. And their Ha...