Magnetization reversal behavior of nanogranular CoCrPt alloy thin films studied with magnetic transmission X-ray microscopy

Fischer, Peter; Im, Maesoon; Eimüller, T.; Schütz, Gisela; Shin, Sung‐Chul

doi:10.1016/j.jmmm.2004.09.085

Cited by 7 publications

(3 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although studies of PMA media are generally based on macroscopic magnetometry observations 13 14 , a microscopic view of the magnetic properties, which can be obtained via magnetic microscopy 15 16 17 18 and X-ray scattering 19 20 21 22 , is often lacking. We present here a unique coherent X-ray magnetic correlation study, mapping out nanoscale magnetic memory phenomena in exchange-biased PMA multilayers throughout their magnetization process.…”

mentioning

confidence: 99%

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

et al. 2016

View full text Add to dashboard Cite

The advance of magnetic nanotechnologies relies on detailed understanding of nanoscale magnetic mechanisms in materials. Magnetic domain memory (MDM), that is, the tendency for magnetic domains to repeat the same pattern during field cycling, is important for magnetic recording technologies. Here we demonstrate MDM in [Co/Pd]/IrMn films, using coherent X-ray scattering. Under illumination, the magnetic domains in [Co/Pd] produce a speckle pattern, a unique fingerprint of their nanoscale configuration. We measure MDM by cross-correlating speckle patterns throughout magnetization processes. When cooled below its blocking temperature, the film exhibits up to 100% MDM, induced by exchange-coupling with the underlying IrMn layer. The degree of MDM drastically depends on cooling conditions. If the film is cooled under moderate fields, MDM is high throughout the entire magnetization loop. If the film is cooled under nearly saturating field, MDM vanishes, except at nucleation and saturation. Our findings show how to fully control the occurrence of MDM by field cooling.

show abstract

mentioning

confidence: 99%

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Yang et al investigated the magnetic properties of sputter‐deposited and annealed CoCr/CoCrPt recording media. Fischer et al reported magnetization reversal behavior of nanogranular CoCrPt alloy thin films by transmission X‐ray microscopy. In spite of many recently published papers on characterization of CoCr‐based alloy thin films, more work is needed to make it possible to obtain optimum characteristics.…”

Section: Introductionmentioning

confidence: 99%

The effect of Al₂ O₃ additive on the microstructure and magnetic properties of Co₇₅ Cr₁₃ Pt₁₂ /Cr thin films

Almasi-Kashi

Jafari-Khamse

Ramazani

et al. 2013

Phys. Status Solidi A

View full text Add to dashboard Cite

Phone/Fax: þ00 983 615 552 935 (Co 75 Cr 13 Pt 12 ) 100Àx (Al 2 O 3 ) x (x ¼ 3, 5, 10, and 13 wt.%) thin films were deposited onto the Cr underlayer by an RF magnetron sputtering technique. The effects of annealing treatment on the structure and magnetic properties of the amorphous film with 13 wt.% Al 2 O 3 content were investigated. Increasing of aluminum oxide between 3 and 13 wt.% causes a reduction in magnetization of the films due to a decrease in the magnetic moments in the layer. On annealing the paramagnetic to ferromagnetic conversion of the film with 13 wt.% aluminum oxide occurred. Since aluminum played a sacrificial role for oxidation of magnetic grains this prevented further reduction of the magnetization. It was concluded that a nonmagnetic element halo formation around the magnetic grains reduces intergranular coupling.

show abstract

“…So, CoCrPt/ceramic/alloy multilayers are one of the most promising candidates for the ultra-high-density magnetic recording media, due to their desirable magnetic properties such as high coercivity and strong magnetocrystalline anisotropy for stable highdensity recording. Many researchers, for instance, Xu et al (2001), Platt et al (2002), Li et al (2004), Fischer et al (2005 and Yang et al (2006) have studied the magnetic and microstructural properties of CoCrPt/ceramic/alloy thin films utilized for ultra-high-density recording. In this study, we concentrated our attention on the microstructure evaluation of nano-grain Al 2 O 3 crystallites evolved by annealing the sputtered (Co 75 Cr 13 Pt 12 ) 100−X (Al 2 O 3 ) X granular films.…”

Section: Introductionmentioning

confidence: 99%

Nano-grain Al2O3 crystals grown by sputtering of aluminium on CoCrPt thin films for potential application in ultra-high-density recording media

Manafi¹,

Pooladi²,

Bahrevar³

et al. 2009

Journal of Materials Processing Technology

View full text Add to dashboard Cite

Magnetization reversal behavior of nanogranular CoCrPt alloy thin films studied with magnetic transmission X-ray microscopy

Cited by 7 publications

References 16 publications

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

The effect of Al₂ O₃ additive on the microstructure and magnetic properties of Co₇₅ Cr₁₃ Pt₁₂ /Cr thin films

Nano-grain Al2O3 crystals grown by sputtering of aluminium on CoCrPt thin films for potential application in ultra-high-density recording media

Contact Info

Product

Resources

About

Magnetization reversal behavior of nanogranular CoCrPt alloy thin films studied with magnetic transmission X-ray microscopy

Cited by 7 publications

References 16 publications

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

Shaping nanoscale magnetic domain memory in exchange-coupled ferromagnets by field cooling

The effect of Al2 O3 additive on the microstructure and magnetic properties of Co75 Cr13 Pt12 /Cr thin films

Nano-grain Al2O3 crystals grown by sputtering of aluminium on CoCrPt thin films for potential application in ultra-high-density recording media

Contact Info

Product

Resources

About

The effect of Al₂ O₃ additive on the microstructure and magnetic properties of Co₇₅ Cr₁₃ Pt₁₂ /Cr thin films