2013
DOI: 10.1088/0953-8984/25/38/386005
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Concentration- and thickness-dependent magnetic properties of NixMn100−xin epitaxially grown NixMn100−x/Ni/(Co/)Cu3Au(001)

Abstract: Magnetic proximity effects in single-crystalline NixMn100-x/Ni(/Co) bilayers on Cu3Au(001) are investigated for in-plane (IP) and out-of-plane (OoP) magnetization by means of the longitudinal and polar magneto-optical Kerr effect. Attention is paid to the influence on concentration- and thickness-dependent antiferromagnetic ordering (TAFM) and blocking (Tb) temperatures as well as the exchange bias field (Heb). For all the NixMn100-x films under study in contact with IP Ni, increasing TAFM is observed with dec… Show more

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Cited by 7 publications
(12 citation statements)
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“…With decreasing Ni concentration, H eb and T normalb shift to higher values in both types of films, ALF, and disordered alloys, for the latter consistent with Ref. [22]. Interestingly, adding 1 ML of Mn to the 1 ML Mn/1 ML Ni film, making it in total 16 ML, results in higher values for coercivity, exchange–bias field, and T normalb compared to 15 ML ALF and also to the 15 ML thick equiatomic disordered alloy.…”
Section: Resultssupporting
confidence: 88%
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“…With decreasing Ni concentration, H eb and T normalb shift to higher values in both types of films, ALF, and disordered alloys, for the latter consistent with Ref. [22]. Interestingly, adding 1 ML of Mn to the 1 ML Mn/1 ML Ni film, making it in total 16 ML, results in higher values for coercivity, exchange–bias field, and T normalb compared to 15 ML ALF and also to the 15 ML thick equiatomic disordered alloy.…”
Section: Resultssupporting
confidence: 88%
“…It has a twofold effect: on the one hand, it increases the effective thickness of the AFM layer, which, due to finite‐size scaling, directly affects T normalN , as has been shown before for disordered NiMn alloys. [ 22 ] On the other hand, it raises the overall Mn concentration in the film, which also enhances T normalN . A higher T normalN results in a higher stability of the AFM spin structure, a stronger coupling to the FM layer at a given temperature, and thus to larger H eb , T normalb , and H normalC .…”
Section: Resultsmentioning
confidence: 99%
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“…All the three materials were deposited from high-purity (Co and Ni: 99.99%, Mn: 99.95%) rods by electron bombardment with the substrate held at room temperature. Film thicknesses were calibrated by medium energy electron diffraction and Auger electron spectroscopy, as described elsewhere [21]. Approximately two atomic monolayers (ML) Co were deposited on one half of the Cu 3 Au 001 Before each measurement series, the samples were fieldcooled from 490 K in a field of +20 mT along the easy axis of the respective probed interface.…”
Section: Methodsmentioning
confidence: 99%
“…We have shown previously that the surface roughness and crystalline structure of a Ni film grown on top of a thin Co layer on Cu 3 Au(001) is very similar to the one of Ni directly deposited on Cu 3 Au(001) [20]. Ni x Mn 100−x AFM layers grown on top of Ni/Cu 3 Au(001) or Ni/Co/Cu 3 Au(001) couple to the FM layer both for IP and OoP easy axis of magnetization in a wide range of concentrations x, while a lower x leads to a higher blocking temperature for EB [21]. .…”
Section: Introductionmentioning
confidence: 91%