Antiferromagnetic phase transitions in an ordered<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mi mathvariant="normal">Pt</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mi mathvariant="normal">Fe</mml:mi><mml:mrow><mml:mo>(</mml:mo><mml:mn>111</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:mrow></mml:math>film studied by neutron diffraction

Krishnamurthy, V. V.; Zoto, I.; Mankey, G. J.; Robertson, J. L.; Maat, S.; Fullerton, Eric E.; Nwagwu, I.; Akujieze, J. K.

doi:10.1103/physrevb.70.024424

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…13,15,18 The growth temperatures, T G ¼ 1023 K; T G ¼ 948 K, and T G ¼ 873 K are based on preliminary studies with similar FePt 3 samples. 14,16,18 Chemically disordered FePt 3 crystallizes in face-centered-cubic (fcc) structure ( Fig. 1(a)), in which diffraction along (001) lattice directions are structure factor forbidden.…”

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confidence: 99%

Tailoring exchange bias through chemical order in epitaxial FePt3 films

Saerbeck

Zhu

Lott

et al. 2013

Journal of Applied Physics

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Intentional introduction of chemical disorder into mono-stoichiometric epitaxial FePt3 films allows to create a ferro-/antiferromagnetic two-phase system, which shows a pronounced and controllable exchange bias effect. In contrast to conventional exchange bias systems, granular magnetic interfaces are created within the same crystallographic structure by local variation of chemical order. The amount of the exchange bias can be controlled by the relative amount and size of ferromagnetic and antiferromagnetic volume fractions and the interface between them. The tailoring of the magnetic composition alone, without affecting the chemical and structural compositions, opens the way to study granular magnetic exchange bias concepts separated from structural artifacts.

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confidence: 99%

Tailoring exchange bias through chemical order in epitaxial FePt3 films

Saerbeck

Zhu

Lott

et al. 2013

Journal of Applied Physics

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“…If we assume that the magnetization follows a temperature dependent phenomenological power law with an exponent of 0.37Ϯ 0.02, 14 and that phenomenological the Fe 65 Co 35 layers have a Curie temperature of 1250°C, then the zero temperature magnetization will increase by 9.4%. We would expect that the Fe 65 Co 35 layers would have a bulklike Curie temperature since the predictions of the finite-size scaling model show a marked decrease in the Curie temperature only for films less than 0.34 nm thick.…”

Section: B Magnetic Characterizationmentioning

confidence: 99%

High magnetization FeCo∕Pd multilayers

Walock

Ambaye

Chshiev

et al. 2008

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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We have fabricated multilayer samples with varying superlattice periodicity and interlayer thicknesses to determine the nature of the enhanced moment in this intriguing thin film system. Magnetic characterization experiments show an enhanced magnetic moment in the multilayers as compared to a single layer film containing the same amount of FeCo. However, since the magnetization is defined as the magnetic moment divided by the sample volume, the sample exhibits an overall reduction in the magnetization when the volume of the Pd layers is also taken into account. Our experimental findings are also supported by theoretical calculations which identify the origin of the increased magnetic moment in the multilayer system. Polarized neutron reflectivity experiments will be used to determine the lateral distribution of the magnetization in a number of superlattice samples.

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“…The Fe 3 Pt phase is soft ferromagnetic (saturation magnetization, M s $ 1.8 T at room temperatures), and it is useful for the development of exchangecoupled type nano-composite magnets in a mixture with L1 0 FePt [17][18][19][20][21]. The FePt 3 is ferromagnetic in the chemically disordered state (Curie temperature, T c $ 360-400 K), and antiferromagnetic (AF) in ordered state.…”

Section: Introductionmentioning

confidence: 99%