Recent development of thin film materials for magnetic heads

The electronic structure of ultrathin films of ␥Ј-Fe 4 N͑100͒ deposited on Cu͑100͒ has been characterized by a combination of photoelectron spectroscopies, scanning tunneling microscopy, and diffraction techniques. The comparison of the data with first-principles simulations sheds light on magnetic moments, type of bonding, and charge transfer. N atoms residing in the bulk or at the surface are found to be distinguishable. The ␥Ј-Fe 4 N͑100͒ surface is laterally heterogeneous and contains both areas reconstructed with a p4gm͑2 ϫ 2͒ symmetry and bulklike terminated. The densities of states of the reconstructed and unreconstructed areas of the surface are obtained and compared with the experiment. Comparison with c͑2 ϫ 2͒N/Fe͑100͒ provides spectroscopic evidence that a subsurface excess of N drives the p4gm͑2 ϫ 2͒ reconstruction.

show abstract

“…2 In particular, thin epitaxial films of ␥Ј-Fe 4 N have been grown on MgO͑001͒ ͑Refs. 3 and 4͒ or on Cu͑100͒ ͑Refs.…”

Section: Introductionmentioning

confidence: 99%

Electronic structure of ultrathinγ′−Fe4N(100) films epitaxially grown on Cu(100)

et al. 2007

View full text Add to dashboard Cite

show abstract

“…2 The known magnetic iron nitrides are concentrated in the N-poor part of the Fe-N phase diagram. Much interest in ␣Љ-Fe 16 N 2 was driven by claims of a magnetic moment of 2.9-Bohr magnetons per Fe atom, larger than in bulk bcc Fe, 3-5 a claim not confirmed later by subsequent experiments due to difficulties in preparing a pure phase or in knowing precisely the amount of active phase present in the samples.…”

Section: Introductionmentioning

confidence: 99%

Nonmagneticγ″-FeNthin films epitaxially grown on Cu(001): Electronic structure and thermal stability

et al. 2008

View full text Add to dashboard Cite

“…These materials have high saturation flux density and the use of thin films controls eddy current losses at frequencies up and above 100 MHz (Jagielinski 1990;Kohmoto 1991). Structures with very small feature size are fabricated used photolithography techniques borrowed from the microelectronics industry.…”

Section: Motivation For Microscale Magnetic Componentmentioning

confidence: 99%

Design methodology and fabrication process of a microinductor for the next generation of DC–DC power converters

Flynn

Desmulliez

2009

Microsyst Technol

View full text Add to dashboard Cite

Magnetic materials used in cored microinductors to supersede ferrite in the 0.5-10 MHz frequency range are investigated in this article. The performance of electrodeposited nickel-iron, cobalt-iron-copper alloys and the commercial alloy Vitrovac 6025 have been assessed through their inclusion within a custom-made solenoid microinductor. Although the present inductor achieves 77% power efficiency at 500 KHz for 24.7 W/cm 3 power density, an optimized process predicts a power efficiency of 97% for 30.83 W/cm 3 power density. The main issues regarding microinductor design and performance are discussed.

show abstract

Recent development of thin film materials for magnetic heads

Cited by 48 publications

References 30 publications

Electronic structure of ultrathinγ′−Fe4N(100) films epitaxially grown on Cu(100)

Electronic structure of ultrathinγ′−Fe4N(100) films epitaxially grown on Cu(100)

Nonmagneticγ″-FeNthin films epitaxially grown on Cu(001): Electronic structure and thermal stability

Design methodology and fabrication process of a microinductor for the next generation of DC–DC power converters

Contact Info

Product

Resources

About