Parametric sensitivity analysis on the giant magnetoresistive characteristics of synthetic antiferromagnet-based spin-valves

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Abstract

A series of static calculations based on the Landau-Lifschitz-Gilbert equation incorporating a single-domain multilayer model applied on synthetic antiferrimagnet (SyAF) based spin-valve structures was carried out to investigate their giant magnetoresistive (GMR) transfer behaviors. The typical multilayer structure comprises NiFe (3.2)/CoFe (1.6)/Cu (2.8)/CoFe (P2, 3.0)/Ru (0.7)/CoFe (P1, 1.5)/IrMn (9.0) (in nm). Four fitting parameters were obtained from the comparisons between the calculated and experimental results: (i) the indirect exchange coupling energy (J1) between P1 and P2 layers=-1.5erg/cm2, (ii) the exchange biasing energy between P1 and IrMn layer (Jeb)=0.13erg/cm2, (iii) the relative GMR contribution (R) due to the angular difference of magnetizations in CoFe (P2)/Ru/CoFe (P1) trilayers=3%, and (iv) the induced uniaxial anisotropy value (Hua) of CoFe layers=40Oe. These values appear reasonable and are within the range of those reported in the literatures, indicating that the present single-domain model works well. In order to examine how these parameters affect the MR transfer curve, one of these parameters was systematically varied while the rest were fixed. J1 was found to be mainly related with the saturation field (Hs) and the field at which the maximum sub-peak MR ratio (Hsub). Jeb influenced on the effective exchange field (Hex.eff). It was also observed that R increases the total MR ratio, but the MR transfer curve was less affected by Hua.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume250
DOIs
Publication statusPublished - 2002 Sep 1

Fingerprint

sensitivity analysis
Sensitivity analysis
Multilayers
Exchange coupling
Magnetization
Anisotropy
curves
laminates
energy transfer
saturation
magnetization
anisotropy
energy

Keywords

  • CoFe/Ru/CoFe
  • Computer simulation
  • Giant magnetoresistance
  • Spin-valve
  • Synthetic antiferromagnet

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Parametric sensitivity analysis on the giant magnetoresistive characteristics of synthetic antiferromagnet-based spin-valves",
abstract = "A series of static calculations based on the Landau-Lifschitz-Gilbert equation incorporating a single-domain multilayer model applied on synthetic antiferrimagnet (SyAF) based spin-valve structures was carried out to investigate their giant magnetoresistive (GMR) transfer behaviors. The typical multilayer structure comprises NiFe (3.2)/CoFe (1.6)/Cu (2.8)/CoFe (P2, 3.0)/Ru (0.7)/CoFe (P1, 1.5)/IrMn (9.0) (in nm). Four fitting parameters were obtained from the comparisons between the calculated and experimental results: (i) the indirect exchange coupling energy (J1) between P1 and P2 layers=-1.5erg/cm2, (ii) the exchange biasing energy between P1 and IrMn layer (Jeb)=0.13erg/cm2, (iii) the relative GMR contribution (R) due to the angular difference of magnetizations in CoFe (P2)/Ru/CoFe (P1) trilayers=3{\%}, and (iv) the induced uniaxial anisotropy value (Hua) of CoFe layers=40Oe. These values appear reasonable and are within the range of those reported in the literatures, indicating that the present single-domain model works well. In order to examine how these parameters affect the MR transfer curve, one of these parameters was systematically varied while the rest were fixed. J1 was found to be mainly related with the saturation field (Hs) and the field at which the maximum sub-peak MR ratio (Hsub). Jeb influenced on the effective exchange field (Hex.eff). It was also observed that R increases the total MR ratio, but the MR transfer curve was less affected by Hua.",
keywords = "CoFe/Ru/CoFe, Computer simulation, Giant magnetoresistance, Spin-valve, Synthetic antiferromagnet",
author = "Park, {Jeong Suk} and Lee, {Seong Rae} and Young-geun Kim and Lim, {Sang Ho}",
year = "2002",
month = "9",
day = "1",
doi = "10.1016/S0304-8853(02)00408-0",
language = "English",
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pages = "25--31",
journal = "Journal of Magnetism and Magnetic Materials",
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T1 - Parametric sensitivity analysis on the giant magnetoresistive characteristics of synthetic antiferromagnet-based spin-valves

AU - Park, Jeong Suk

AU - Lee, Seong Rae

AU - Kim, Young-geun

AU - Lim, Sang Ho

PY - 2002/9/1

Y1 - 2002/9/1

N2 - A series of static calculations based on the Landau-Lifschitz-Gilbert equation incorporating a single-domain multilayer model applied on synthetic antiferrimagnet (SyAF) based spin-valve structures was carried out to investigate their giant magnetoresistive (GMR) transfer behaviors. The typical multilayer structure comprises NiFe (3.2)/CoFe (1.6)/Cu (2.8)/CoFe (P2, 3.0)/Ru (0.7)/CoFe (P1, 1.5)/IrMn (9.0) (in nm). Four fitting parameters were obtained from the comparisons between the calculated and experimental results: (i) the indirect exchange coupling energy (J1) between P1 and P2 layers=-1.5erg/cm2, (ii) the exchange biasing energy between P1 and IrMn layer (Jeb)=0.13erg/cm2, (iii) the relative GMR contribution (R) due to the angular difference of magnetizations in CoFe (P2)/Ru/CoFe (P1) trilayers=3%, and (iv) the induced uniaxial anisotropy value (Hua) of CoFe layers=40Oe. These values appear reasonable and are within the range of those reported in the literatures, indicating that the present single-domain model works well. In order to examine how these parameters affect the MR transfer curve, one of these parameters was systematically varied while the rest were fixed. J1 was found to be mainly related with the saturation field (Hs) and the field at which the maximum sub-peak MR ratio (Hsub). Jeb influenced on the effective exchange field (Hex.eff). It was also observed that R increases the total MR ratio, but the MR transfer curve was less affected by Hua.

AB - A series of static calculations based on the Landau-Lifschitz-Gilbert equation incorporating a single-domain multilayer model applied on synthetic antiferrimagnet (SyAF) based spin-valve structures was carried out to investigate their giant magnetoresistive (GMR) transfer behaviors. The typical multilayer structure comprises NiFe (3.2)/CoFe (1.6)/Cu (2.8)/CoFe (P2, 3.0)/Ru (0.7)/CoFe (P1, 1.5)/IrMn (9.0) (in nm). Four fitting parameters were obtained from the comparisons between the calculated and experimental results: (i) the indirect exchange coupling energy (J1) between P1 and P2 layers=-1.5erg/cm2, (ii) the exchange biasing energy between P1 and IrMn layer (Jeb)=0.13erg/cm2, (iii) the relative GMR contribution (R) due to the angular difference of magnetizations in CoFe (P2)/Ru/CoFe (P1) trilayers=3%, and (iv) the induced uniaxial anisotropy value (Hua) of CoFe layers=40Oe. These values appear reasonable and are within the range of those reported in the literatures, indicating that the present single-domain model works well. In order to examine how these parameters affect the MR transfer curve, one of these parameters was systematically varied while the rest were fixed. J1 was found to be mainly related with the saturation field (Hs) and the field at which the maximum sub-peak MR ratio (Hsub). Jeb influenced on the effective exchange field (Hex.eff). It was also observed that R increases the total MR ratio, but the MR transfer curve was less affected by Hua.

KW - CoFe/Ru/CoFe

KW - Computer simulation

KW - Giant magnetoresistance

KW - Spin-valve

KW - Synthetic antiferromagnet

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U2 - 10.1016/S0304-8853(02)00408-0

DO - 10.1016/S0304-8853(02)00408-0

M3 - Article

VL - 250

SP - 25

EP - 31

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

ER -