Exchange bias in reduced dimensions: cobalt nanocluster arrays under the influence of nanometer thin MnPt capping layers

Kód výsledku v IS VaVaI

RIV/68378271:_____/14:00432638 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1063/1.4795274

DOI - Digital Object Identifier

10.1063/1.4795274

Jazyk výsledku

angličtina

Název v původním jazyce

Exchange bias in reduced dimensions: cobalt nanocluster arrays under the influence of nanometer thin MnPt capping layers

Popis výsledku v původním jazyce

The magnetic behavior of cobalt nanocluster arrays arranged on a boron-nitride nanomesh and capped with MnPt layers of varying thickness θ MnPt is investigated. The magnetic properties of the arrays are found to be strongly dependent on the cobalt nanocluster size: large 3-dimensional clusters of several nanometers size under the influence of only θ MnPt 5nm exhibit prototypical exchange bias behavior, whereas small 2-dimensional clusters of about 1nm in diameter show superparamagnetic behavior, however, with a strong quenching of the average cobalt magnetization. The latter effect is correlated with the formation of a stable antiferromagnetic phase at increasing θMnPt and is discussed in terms of the domain state exchange bias model. The quenching suggests either partial antiferromagnetic alignment of cobalt spins within a cluster or a random orientation of cobalt cluster macrospins with respect to each other.

Název v anglickém jazyce

Exchange bias in reduced dimensions: cobalt nanocluster arrays under the influence of nanometer thin MnPt capping layers

Popis výsledku anglicky

The magnetic behavior of cobalt nanocluster arrays arranged on a boron-nitride nanomesh and capped with MnPt layers of varying thickness θ MnPt is investigated. The magnetic properties of the arrays are found to be strongly dependent on the cobalt nanocluster size: large 3-dimensional clusters of several nanometers size under the influence of only θ MnPt 5nm exhibit prototypical exchange bias behavior, whereas small 2-dimensional clusters of about 1nm in diameter show superparamagnetic behavior, however, with a strong quenching of the average cobalt magnetization. The latter effect is correlated with the formation of a stable antiferromagnetic phase at increasing θMnPt and is discussed in terms of the domain state exchange bias model. The quenching suggests either partial antiferromagnetic alignment of cobalt spins within a cluster or a random orientation of cobalt cluster macrospins with respect to each other.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

—

Svazek periodika

113

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000316967800033

EID výsledku v databázi Scopus

2-s2.0-84875786098