Perpendicular magnetic anisotropy of Ni/Cu(001) films with surface passivation

Pan, W.; Shih, Ying-Ta; Lee, Kuo-Long; Shen, Wenhe; Tsai, Chieh-Yuan; Wei, Der-Hsin; Chan, Yuet-Loy; Chang, Hwan‐You

doi:10.1063/1.3676227

Cited by 7 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of T ¼ 5 K and T ¼ 150 K, the experimental data points were obtained only from SQUID measurements, whereas in the case of T ¼ 300 K, the experimental data points were obtained by the combination of SQUID and magneto-optical Kerr effect (MOKE) measurements. 35,36 Finally, the relatively weak temperature dependence of K s in our multilayers is in agreement with previous reports for the…”

Section: Temperature-dependent Magnetic Propertiessupporting

confidence: 93%

Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers

Pappas

Kapaklis

Delimitis

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

Ni/NiO multilayers were grown by magnetron sputtering at room temperature, with the aid of the natural oxidation procedure. That is, at the end of the deposition of each single Ni layer, air is let to flow into the vacuum chamber through a leak valve. Then, a very thin NiO layer ($1.2 nm) is formed. Simulated x-ray reflectivity patterns reveal that layering is excellent for individual Ni-layer thickness larger than 2.5 nm, which is attributed to the intercalation of amorphous NiO between the polycrystalline Ni layers. The magnetization of the films, measured at temperatures 5-300 K, has almost bulk-like value, whereas the films exhibit a trend to perpendicular magnetic anisotropy (PMA) with an unusual significant positive interface anisotropy contribution, which presents a weak temperature dependence. The power-law behavior of the multilayers indicates a non-negligible contribution of higher order anisotropies in the uniaxial anisotropy. Bloch-law fittings for the temperature dependence of the magnetization in the spin-wave regime show that the magnetization in the multilayers decreases faster as a function of temperature than the one of bulk Ni. Finally, when the individual Ni-layer thickness decreases below 2 nm, the multilayer stacking vanishes, resulting in a dramatic decrease of the interface magnetic anisotropy and consequently in a decrease of the perpendicular magnetic anisotropy. V

show abstract

Section: Temperature-dependent Magnetic Propertiessupporting

confidence: 93%

Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers

Pappas

Kapaklis

Delimitis

et al. 2012

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…This could explain why only H c enhancement without exchange bias is found in this NiO/Ni/Cu(001) and NiO/Co x Ni 1-x /Cu(001) system when the temperature is below the N eel temperature. 21 …”

Section: Resultsmentioning

confidence: 97%

Spin alignment of surface oxidized CoxNi1–x/Cu(001)

Shih

Tsai

et al. 2013

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

We investigated the ferromagnetic (FM)/antiferromagnetic (AF) spin alignment of a 13 monolayer oxidized CoxNi1–x/Cu(001) (x = 0 or 0.05) surface by X-ray magnetic circular dichroism and X-ray magnetic linear dichroism photoemission electron microscopy (XMCD-PEEM and XMLD-PEEM). Surface NiO and the underlying Ni (CoxNi1–x) were found to be AF and FM by analyzing the gray scale of XMLD-PEEM and XMCD-PEEM images; this indicates the spin orientation with respect to the polarization of the incident X-ray. We found both collinear and perpendicular alignment of the FM and AF spins. This suggests that the AF NiO is magnetically random, resulting in coercivity enhancement without exchange bias in the surface-oxidized CoxNi1–x/Cu(001) films.

show abstract

“…The Néel temperature of bulk CoO is 293 K [26] and can be even lower in CoO ultrathin films [26,27]. To change T N of the coupled AFM layer, the topmost atomic layers of Ni were intentionally oxidized [28,29] and then covered with another 3 ML of CoO. Additionally, before deposition of the CoO layer, PMOKE measurements were also performed for NiO/Ni/Pd(0 0 1).…”

Section: Resultsmentioning

confidence: 99%

Impact of orthogonal exchange coupling on magnetic anisotropy in antiferromagnetic oxides/ferromagnetic systems

Kuświk

Gastelois

Głowiński

et al. 2016

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The influence of interface exchange coupling on magnetic anisotropy in the antiferromagnetic oxide/Ni system is investigated. We show how interfacial exchange coupling can be employed not only to pin the magnetization of the ferromagnetic layer but also to support magnetic anisotropy to orient the easy magnetization axis perpendicular to the film plane. The fact that this effect is only observed below the Néel temperature of all investigated antiferromagnetic oxides with significantly different magnetocrystalline anisotropies gives evidence that antiferromagnetic ordering is a source of the additional contribution to the perpendicular effective magnetic anisotropy.

show abstract

Perpendicular magnetic anisotropy of Ni/Cu(001) films with surface passivation

Cited by 7 publications

References 20 publications

Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers

Layering and temperature-dependent magnetization and anisotropy of naturally produced Ni/NiO multilayers

Spin alignment of surface oxidized CoxNi1–x/Cu(001)

Impact of orthogonal exchange coupling on magnetic anisotropy in antiferromagnetic oxides/ferromagnetic systems

Contact Info

Product

Resources

About