ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this work, a study of the sensitivity enhancement of spin valve sensors, when locatedin close proximity to magnetic flux guides, is presented. The magnetoresistance (MR) of spin-valvesensors, lithographically patterned into stripes with lateral dimensions, (length) l = 500 µm, (width)wsensor = 1, 2, 6 µm and placed near one/two Co93.5Zr2.8Nb3.7 (CZN) magnetic flux guide, ischaracterized at room temperature. CZN has a high permeability that together with a definedmicrostructured shape, is able to concentrate the magnetic flux in a small area, leading to anincrease in sensor's sensitivity. The magnetic field amplification is estimated by comparison ofsensor sensitivity with/without magnetic flux guides, in the linear operation range, and studied as afunction of different parameters. Besides an enhancement in sensitivity, sensors also exhibit animportant increase in the hard axis coercivity and a shift from MR(H=0) = 0.5, both attributed to themagnetic flux guides. Amplification factors of the order of 20 are observed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.313.pdf
