Anomalous Spontaneous Reversal in Magnetic Heterostructures

Author

Li, Z. ; Miller, C.W. ; Eisenmenger, J. ; Roshchin, I.V. ; Schuller, I.K.

Author_Institution

California Univ. San Diego, La Jolla

fYear

2006

fDate

8-12 May 2006

Firstpage

962

Lastpage

962

Abstract

This papers present a novel phenomenon in FM/AF heterostructure systems (AF = FeF₂, FM= (Ni,Co)), where the FM switching can be also controlled by thermal cycling. It was found that a FM saturated above the AF Neel temperature T_N, spontaneously reverses its magnetization against a constant field with decreasing temperature. This reversal also exhibits a significant magnetization vs. temperature hysteresis, with a tunable height and width by the field. This is reminiscent of the conventional magnetization hysteresis and enables one to control the FM switching by thermal cycles, and may have implication on the thermally assisted magnetic recording.

Keywords

Neel temperature; antiferromagnetic materials; cobalt; ferromagnetic materials; interface magnetism; iron compounds; magnetic hysteresis; magnetic recording; magnetic switching; magnetisation reversal; nickel; FeF₂-Co; FeF₂-Ni; anamalous spontaneous reversal; antiferromagnetic Neel temperature; ferromagnetic switching; ferromagnetic-antiferromagnetic heterostructure systems; magnetic heterostructures; magnetization hysteresis; magnetization reversal; thermal cycling; thermally assisted magnetic recording; Cooling; Hybrid fiber coaxial cables; Magnetic fields; Magnetic hysteresis; Magnetic properties; Magnetic sensors; Magnetic switching; Physics; Saturation magnetization; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.374993

Filename

4262395