Uncompensated moments in antiferromagnets: Origin, properties and role in exchange bias

Roshchin, Igor V.; Badgley, Karie; Zhernenkov, Mikhail; Fitzsimmons, M. R.; Varela, M.; Pennycook, Stephen J.; Li, Zhi-Pan; Ponce, H.; Romero, Aldo H.; Miller, Casey W.; Schuller, Iván K.

doi:10.1109/iceaa.2010.5651210

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Also, it has been instrumental to develop theoretical models [6], which mostly rely on the presence of an uncompensated magnetization at or near the surface. Actually, several experimental studies have demonstrated the presence of this magnetization in the vicinity of the FeF 2 surface [7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Surface states of FeF2 (110) and its uncompensated magnetization

Muñoz

Romero

Mejı́a-López

et al. 2015

Journal of Magnetism and Magnetic Materials

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Artículo de publicación ISIThe (110) surface of iron fluoride (FeF2) is especially relevant to the understanding of the exchange bias phenomenon, which has important applications in the sensor industry, and has been extensively explored, both theoretically and experimentally. Here we investigate this FeF2 surface by means of oh mine techniques. We compute the (110) surface reconstruction, energetics, magnetic moments, band structure, charge density and electron localization function, for the two possible terminations (Fe and F). The surface reconstruction modifies the atomic and electronic structure of the free surface, yielding magnetism of a magnitude of 0.1 mu(B) per surface unit cell. Moreover, the charge density also changes, which alters the bonding in the vicinity of the surface. All these changes are expected to be relevant for exchange bias, that is once a ferromagnetic layer is deposited on the FeF2 surface.National Science Foundation OCI-1053575 1003907 state of West Virginia (WVEPSCoR via the Higher Education Policy Commission) WVU Fondo Nacional de Investigaciones Cientificas y Tecnologicas (FONDECYT, Chile) 11110510 1150806 1130672 3140526 1120399 1130272 Financiamiento Basal para Centros Cientificos y Tecnologicos de Excelencia, Chile Donors of the American Chemical Society Petroleum Research Fund 54075-ND1

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Section: Introductionmentioning

confidence: 99%

Surface states of FeF2 (110) and its uncompensated magnetization

Muñoz

Romero

Mejı́a-López

et al. 2015

Journal of Magnetism and Magnetic Materials

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Controlling exchange bias in FeMn with Cu

Kaya

Lapa

Jayathilaka

et al. 2013

Journal of Applied Physics

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To study the effect of non-magnetic layer (Cu) on magnetic properties of antiferromagnetic FeMn, multilayers of Ta(5 nm)/[FeMn(t)/Cu(5 nm)]10/Ta(5 nm), where t is varied in the range of 5–15 nm, are fabricated by a combination of RF and DC magnetron sputter deposition. Magnetization curves for these samples exhibit magnetic hysteresis, and when the samples are cooled in an applied magnetic field, the hysteresis loops are shifted. This shift is attributed to an “intrinsic” exchange bias effect (i.e., it is observed without a separate ferromagnetic layer). Presented temperature and thickness dependences of the coercive field, magnetic moment, and exchange bias field provide insights into the origin and mechanism of the observed intrinsic exchange bias.

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Uncompensated moments in antiferromagnets: Origin, properties and role in exchange bias

Cited by 2 publications

References 7 publications

Surface states of FeF2 (110) and its uncompensated magnetization

Surface states of FeF2 (110) and its uncompensated magnetization

Controlling exchange bias in FeMn with Cu

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