Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 42 for “"Magnetoresistive"”.
-
Resistance noise in giant magnetoresistive materials
We have studied resistance noise in a variety of systems exhibiting giant magnetoresistance (GMR) including coupled and uncoupled multilayers, spin-valves and granular systems. Large equilibrium 1/f noise in the resistance of these materials is associated with the GMR effect. One consequence was …
-
Unidirectional Magnetoresistive Behaviors: Materials, Characterization, and Prospects
… with a two-terminal configuration.Unidirectional magnetoresistive behaviors, including USMR, unidirectional magnetoresistance (UMR), and bilinear magnetoelectric resistance (BMER), have drawn attention not only due to their potential application but also for their fascinating physics. Observed in …
-
Magneto-transport properties of giant magnetoresistive systems
To understand the cause of the giant magnetoresistance effect, we have systematically investigated magnetothermopower, magneto-thermal conductivity and magnetoresistivity in both ferromagnetic/non-magnetic multilayers and granular solids which exhibit the giant magnetoresistance effect.
-
Integration of tunneling magnetoresistive sensors for high resolutive magnetic particle detection
… of bionanodevices. Among them, tunneling magnetoresistive (TMR) biosensors are of great interest and their improvements constitute the subject of the present thesis.
-
Magnetoresistive Random Access Memory (MRAM) technology : current advancement and future development
… compatible and read/write (R/W) endurance. Magnetoresistive RAM (MRAM) offers such possibility. MRAM has just entered in 2002 with 128kbit product, but it has improved to reach 16 Mbit density in the year 2009, that makes a 128 density multiplication in 7 years. The prototyping has gone …
-
High pressure effects on electron transport and structure of colossal magnetoresistive materials
… and structure of several typical colossal magnetoresistive manganites, La_{0.60}Y_{0.07}Ca_{0.33}MnO_3, Pr_{1-x}Ca_xMn0_3 (X = 0.25, 0.30, 0.35), Nd_{1-x}Sr_xMnO_3 (x = 0.45, 0.50), were explored through high pressure resistivity and structure measurements. It was shown that pressure up to …
-
The Development of Alkoxy-Based Sol -Gel Processing for Magnetoresistive Manganite Thin Films
… 650°C, 700°C, and 750°C. Magnetoresistive response improved with heat-treatment temperature for the more refractory La0.67Ba0.33MnO3 composition. The lead-doped counterpart offered the best property evolution, with TC = 320 K and TIM = 254 K by 750°C on …
-
The development of alkoxy-based sol-gel processing for magnetoresistive manganite thin films
… sol-gel process for integrating thin films of magnetoresistive doped-lanthanide manganites onto silicon-based substrates. Crystallization of the requisite perovskite phase at temperatures below 650°C resulted from the incorporation of all-alkoxide precursors, and in particular, Mn[OC(CH 3 ) 3 …
-
Development of magnetic tunnel junction (MTJ) sensors for the detection of single magnetic particles
In the last few years, magnetoresistive transducers, such as giant magnetoresistances, have become potential sensing elements in various biosensors for the detection or identification of biomolecules. In these biosensors, magnetic microsized and nanosized particles have been used as markers of …
-
Realization of TMR devices in an industrial environment
Magnetoresistive sensors are widely used in sensor applications for magnetic field measurements. Currently these sensors mostly use the Anisotropic Magnetoresistive Effect (AMR) or the Giant Magnetoresistive Effect (GMR). Due to their unique properties sensors based on the TMR effect could be …
-
Superconducting tunneling spectroscopy of low-dimensional materials
… physics observed in other similar colossal magnetoresistive materials, which manifests as multi-level noise. One of the first magnetoresistive measurements of ultrathin films of bismuth and bismuth-antimony are also presented, and it is shown that there are transport signatures consistent …
-
Ferromagnetic dynamics in coupled systems
… can be applied to understand features of the magnetoresistive signal and observe a current dependent uniaxial magnetoresistive signal at high current densities which is attributed to the onset of auto-oscillations within the exchange magnon population of the nanowires.
-
Deep penetration magnetoquasistatic sensors
… Replacing the secondary winding with a magnetoresistive sensor allows the magnetometer to be operated at frequencies much lower than ordinarily possible, including static (DC) operation, which enables deep penetration defect imaging. Low frequencies are needed for deep probing of metals, …
-
Electrochemical fabrication of AuCo nanostructures
… or nanotubes were formed. The magnetic and magnetoresistive properties of Au/CoAu multilayered nanostructures were examined. Au/CoAu multilayered thin films exhibited both normal and inverse CIP GMR. After electrodeposition, the solid nanowires were released from the template and one …
-
First-principles and Many-Body Methods: Implementations and Applications to Study Spintronic Materials
Diluted magnetic semiconductors (DMSs) and magnetoresistive materials are instrumental for the development of spintronic technology. Before we are able to engineer spintronic devices, it is necessary to understand the properties of materials from which spintronic devices are made, otherwise time …
-
Einfluß der magnetischen Dipolkopplung auf den Tunnelmagnetowiderstand in Schichtsystemen und strukturierten Elementen
… "orange-peel" coupling) in tunneling magnetoresistive (TMR) elements. With an in situ scanning tunneling microscope we directly accessed the roughness of the films and found a close correspondence between the values for the coupling fields determined by the magneto-optical Kerr effect …
-
Magnetic structure in manganites as probed by magnetic force microscopy
… which for some dopings is a colossal magnetoresistive material. I will briefly discuss two ongoing projects: the use of our magnetic force microscope to image field–dependent domain structure in patterned magnetic manganite films and its use as an electrostatic force microscope.
-
Magnetoquasistatic sensors for rapid imaging of steel pipeline properties
… theoretically, leading to the development of magnetoresistive sense elements in a quasi-periodic drive structure. 2. Development and validation of cylindrical geometry models for inductive sensors. The existing models for inductive spatially periodic magnetoquasistatic-field sensors assume a …
Page 1 of 3