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CMR of Co/Cu multilayers with reduced hysteresis and low-field response

Description: We present the results of a systematic study on optimization of the giant magnetoresistance (GMR) response in Co/Cu multilayers (MLs) for copper layer thickness near the second oscillatory peak. Co/Cu MLs with alternating thick (t(1)Co) and thin (t(2)Co) layers have been prepared in the from of [Cot(1)CoA/Cu20A/Cot(2)CoA/Cu20A]15. We have found that the magnetoresistive hysteresis of these MLs is reduced with decreasing t(2)Co and has disappeared when t(2)Co<4.5A. We have obtained an optimal GM… more
Date: February 1, 1997
Creator: Mao, M.; Gibbons, M.; Law, B.; Grabner, F.; Veron, S. & Cerjan, C.
Partner: UNT Libraries Government Documents Department
open access

High yield Cu-Co CPP GMR multilayer sensors

Description: We have fabricated and tested GMR magnetic flux sensors that operate in the CPP mode. This work is a continuation of the ultra-high density magnetic sensor research introduced at INTERMAG 96. We have made two significant modifications to the process sequence. First, contact to the sensor is made through a metal conduit deposited in situ with the multilayers. This deposition replaces electroplating. This configuration ensures a good electrical interface between the top of multilayer stack and th… more
Date: January 15, 1997
Creator: Spallas, J., Mao, M., Law, B., Grabner, F., Cerjan, C., O`Kane, O.
Partner: UNT Libraries Government Documents Department
open access

Influence of Base Pressure on FeMn Exchange Biased Spin-Valve Films

Description: Spin-valve films of structure NiFeCo/Co/Cu/NiFeCo(Co)/FeMn/Cu were deposited on Si substrates by DC planetary magnetron sputtering techniques. The influence of base pressure, P{sub b}, on spin-valve properties was studied by varying P{sub b} over two decades from 3 x 10{sup -8} to 7 x 10{sup -6} Torr. The GMR ratio show a slight increase with increasing P{sub b} until a large decrease occurs at P{sub b} &gt; 3.3 x 10{sup -6} Torr. Exchange bias field and blocking temperature remain constant in … more
Date: August 13, 1999
Creator: Mao, M.; Cerjan, C.; Law, B.; Grabner, F. & Vaidya, S.
Partner: UNT Libraries Government Documents Department
open access

Enhanced spin-valve giant magneto-resistance in non-exchange biased sandwich films

Description: A large giant magnetoresistance (GMR) value of 7.5% has been measured in simple NiFeCo(1)/Cu/NiFeCo(2) sandwich films grown on a 30 {angstrom} Cr seed layer. This spin-valve GMR effect is consistent with the differential switching of the two NiFeCo layers due to an enhanced coercivity of the NiFeCo(1) layer grown on the Cr seed layer. A change in growth texture of the NiFeCo(1) layer from fcc (111) to bcc (110) crystallographic orientation leads to an increase in magnetic anisotropy and an enha… more
Date: February 17, 2000
Creator: Mao, M; Cerjan, C; Law, B; Grabner, F; Miloslavsky, L & Chien, C
Partner: UNT Libraries Government Documents Department
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