Effects of spacer layer on growth, stress and magnetic properties of sputtered permalloy film

Cheng, Shuo; Lubitz, P.; Zheng, Yu‐Xiang; Edelstein, A. S.

doi:10.1016/j.jmmm.2004.04.027

Cited by 36 publications

(22 citation statements)

References 10 publications

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“…Coercive fields also increase with thickness measuring values around 25 Oe for thicknesses above 180 nm. 2 MFM measurements show a stripe domain pattern that proves the existence of an anisotropy component perpendicular to the sample plane ( Figure 3).…”

Section: Resultsmentioning

confidence: 81%

“…2 Base pressure was lower than 10 À6 mbar, and the distance from target to substrate was about 15 cm. The growing rates were 0.14 and 0.03 nm/s for Py and Mo, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…6 However, for thicknesses over 180 nm, sputtered Py films develop perpendicular anisotropy (induced by the columnar morphology of the sputtered films) and these magnetic properties degrade notably. 2 Both coercive and saturating fields are nearly 10 times bigger than those measured for thinner films. There are other growth techniques such as rapid quenching in which it is possible to obtain thick magnetic layers without out of plain anisotropy due to the absence of columnar morphology.…”

Section: Introductionmentioning

confidence: 90%

“…1 Permalloy (Py: Fe 20 Ni 80 ) is a well known magnetic material characterized by its low saturating (H K $ 5 Oe) and coercive fields (H C $ 1 Oe) and can be grown with low internal stresses and nearly zero magnetostriction. 2 These properties make Py a very interesting material for different applications, like anisotropic magnetoresistance sensors, 3 magnetic recording heads, 4 or flux concentrators for MEMS. 5 Properties like permeability or linearity of the hysteresis loops can be controlled by growing Py as a sputtered multilayer with alternating perpendicular anisotropies.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic properties of sputtered Permalloy/molybdenum multilayers

Romera¹,

Ranchal²,

Ciudad³

et al. 2011

Journal of Applied Physics

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In this work, we report the magnetic properties of sputtered Permalloy (Py: Ni 80 Fe 20 )/molybdenum (Mo) multilayer thin films. We show that it is possible to maintain a low coercivity and a high permeability in thick sputtered Py films when reducing the out-of-plane component of the anisotropy by inserting thin film spacers of a non-magnetic material like Mo. For these kind of multilayers, we have found coercivities which are close to those for single layer films with no out-of-plane anisotropy. The coercivity is also dependent on the number of layers exhibiting a minimum value when each single Py layer has a thickness close to the transition thickness between Neel and Bloch domain walls.

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Section: Resultsmentioning

confidence: 81%

“…2 Base pressure was lower than 10 À6 mbar, and the distance from target to substrate was about 15 cm. The growing rates were 0.14 and 0.03 nm/s for Py and Mo, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic properties of sputtered Permalloy/molybdenum multilayers

Romera¹,

Ranchal²,

Ciudad³

et al. 2011

Journal of Applied Physics

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“…The base pressure of the magnetron sputtering system was 4.6 mT. The deposition produced soft, ferromagnetic permalloy films with high permeabilities (m r $ 1000) at H¼0 Oe, low coercivities ($ 0.1 Oe) and low intrinsic stress [20,21]. The surface roughness was on the order of nanometers, as determined by a Veeco Nanoman atomic force microscope (AFM).…”

Section: Writing Informationmentioning

confidence: 99%

A non-erasable magnetic memory based on the magnetic permeability

Petrie

Wieland

Burke

et al. 2014

Journal of Magnetism and Magnetic Materials

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Burke, R. A.; Newburgh, G. A.; Burnette, J. E.; Fischer, G. A.; and Edelstein, A. S., "A non-erasable magnetic memory based on the magnetic permeability" (2014 a b s t r a c tA non-erasable memory based on using differences in the magnetic permeability is demonstrated. The method can potentially store information indefinitely. Initially the high permeability bits were 10-50 μm wide lines of sputtered permalloy (Ni 81 Fe 19 ) on a glass substrate. In a second writing technique a continuous film of amorphous, high permeability ferromagnetic Metglas (Fe 78 Si 13 B 9 ) was sputtered onto a similar glass substrate. Low permeability, crystalline 50 μm wide lines were then written in the film by laser heating. Both types of written media were read by applying an external probe field that is locally modified by the permeability of each bit. The modifications in the probe field were read by a nearby set of 10 micron wide magnetic tunnel junctions with a signal-to-noise ratio of up to 45 dB. This large response to changes in bit permeability is not altered after the media has been exposed to a 6400 Oe field. While being immediately applicable for data archiving and secure information storage, higher densities are possible with smaller read and write heads.Published by Elsevier B.V.

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Influence of electric field on the microstructures and magnetic softness of FeNi nanoparticle films

Xia

et al. 2016

Appl. Phys. A

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Effects of spacer layer on growth, stress and magnetic properties of sputtered permalloy film

Cited by 36 publications

References 10 publications

Magnetic properties of sputtered Permalloy/molybdenum multilayers

Magnetic properties of sputtered Permalloy/molybdenum multilayers

A non-erasable magnetic memory based on the magnetic permeability

Influence of electric field on the microstructures and magnetic softness of FeNi nanoparticle films

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