The Curie temperature distribution of FePt granular magnetic recording media

TY - JOUR

T1 - The Curie temperature distribution of FePt granular magnetic recording media

AU - Hovorka, O.

AU - Devos, S.

AU - Coopman, Q.

AU - Fan, W.J.

AU - Aas, C.J.

AU - Evans, R.F.L.

AU - Chen, X.

AU - Ju, G.

AU - Chantrell, R.W.

N1 - © 2012 American Institute of Physics

PY - 2012/8/1

Y1 - 2012/8/1

N2 - We present atomistic calculations of the magnetic phase transition behavior in an L 1 FePt system to study the effect of grain size distribution on the Curie temperature (T c) dispersion with relevance to heat assisted magnetic recording. Identifying the relation between the size and T c of a grain by means of finite size scaling analysis of the differentiated magnetization versus T data allows to show that a lognormal size distribution transforms into a lognormal T c distribution with moments dependent on the critical exponents. We also address the question of the universality class of FePt.

AB - We present atomistic calculations of the magnetic phase transition behavior in an L 1 FePt system to study the effect of grain size distribution on the Curie temperature (T c) dispersion with relevance to heat assisted magnetic recording. Identifying the relation between the size and T c of a grain by means of finite size scaling analysis of the differentiated magnetization versus T data allows to show that a lognormal size distribution transforms into a lognormal T c distribution with moments dependent on the critical exponents. We also address the question of the universality class of FePt.

UR - http://www.scopus.com/inward/record.url?scp=84864655404&partnerID=8YFLogxK

U2 - 10.1063/1.4740075

DO - 10.1063/1.4740075

M3 - Article

AN - SCOPUS:84864655404

SN - 0003-6951

VL - 101

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

M1 - 052406

ER -