Influence of boron doping on magnetic properties and microwave characteristics of MnIr/FeCoB multilayers

Journal Article · Sun Apr 15 00:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4708813· OSTI ID:22038939

Phuoc, Nguyen N ^[1]; Ong, C K ^[2]

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1. Temasek Laboratories, National University of Singapore, 5 A Engineering Drive 2, Singapore 117411 (Singapore)
2. Department of Physics, Center for Superconducting and Magnetic Materials, National University of Singapore, 2 Science Drive3, Singapore 117542 (Singapore)

A detailed investigation of the influence of B doping on the magnetic properties and high frequency characteristics of FeCoB/MnIr multilayered thin films was carried out. Exchange bias was found to decrease monotonically with B doping possibly due to less favorable of AF phase of MnIr in the samples with rich B concentration. However, with small amount of doping up to 9% of B concentration, the MnIr fcc (111) peaks become more prominent and the real part of permeability enhanced. Our results suggest no correlation between the structural phase of MnIr and the exchange bias. Also, the influences of B doping on several static and dynamic parameters, such as rotational magnetic anisotropy field, coercivity, saturation magnetization, resonance frequency, and effective damping factor are presented and discussed. Our results support the claim that the coercivity enhancement and the arising of rotational anisotropy may have the same physical origin.

• OSTI ID: 22038939
• Journal Information: Journal of Applied Physics, Vol. 111, Issue 8; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANISOTROPY
BORON
BORON ALLOYS
COBALT ALLOYS
COERCIVE FORCE
CORRELATIONS
DOPED MATERIALS
EXCHANGE INTERACTIONS
FCC LATTICES
IRIDIUM ALLOYS
IRON ALLOYS
LAYERS
MAGNETIC SUSCEPTIBILITY
MAGNETIZATION
MANGANESE ALLOYS
MICROWAVE RADIATION
THIN FILMS