Magnetic anisotropy and chemical long-range order in epitaxial ferrimagnetic CrPt3 films

Maret, M.; Albrecht, Manfred; Köhler, J.; Poinsot, R.; Ulhaq‐Bouillet, C.; Tonnerre, J. M.; Bérar, J.F.; Bücher, E.

doi:10.1016/s0304-8853(00)00367-x

Cited by 28 publications

(26 citation statements)

References 21 publications

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“…The measurements of the 113 and 112 reflections allow one to determine the level of chemical ordering as described in Ref. [4]. In a deposit of CrPt 3 at 300 C; a value of 0.6 was found, confirming the origin of the intermediate RHEED spots.…”

Section: Experimental and Resultsmentioning

confidence: 63%

“…Surprisingly, such nanostructured films grown at room temperature exhibit perpendicular magnetic anisotropy, which disappears as soon as the deposition temperature is increased above 100 C favoring the development of L1 2 longe-range ordering in the FCC lattice. Here we present the growth of the ferrimagnetic CrPt 3 and ferromagnetic FePt alloys which owing to their magnetocrystalline anisotropy are also good candidates for magnetic recording media [3][4][5], and also that of the VPt 3 alloy which owing to the expected reduced size of the nanostructures could favor the formation of the still controversial ferrimagnetic L1 2 phase [6].…”

Section: Introductionmentioning

confidence: 96%

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Self-assembling of alloy nanostructures on van der Waals surfaces

Maret

Gilles

Simon

et al. 2005

Journal of Crystal Growth

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Section: Experimental and Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 96%

Self-assembling of alloy nanostructures on van der Waals surfaces

Maret

Gilles

Simon

et al. 2005

Journal of Crystal Growth

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“…Ion irradiated CrPt 3 ordered alloy films by Kr + ion irradiation with low ion doses have been also reported [11]. The CrPt 3 films had been reported as L1 2 -type long-range order (LRO) alloy films [12,13], and ion irradiation was used to transform its structure from ferromagnetic L1 2 to nonmagnetic A1 phase, and it was assumed that there exists no exchange coupling between the bits [11]. In this paper, planarpatterned CrPt 3 nanodots with various dot sizes fabricated by Kr + ion irradiation are investigated.…”

Section: Introductionmentioning

confidence: 97%

Nanoscale patterning of CrPt 3 magnetic thin films by using ion beam irradiation

et al. 2016

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a b s t r a c tWe have successfully fabricated planar patterned CrPt 3 ordered L1 2 alloy films by Kr + ion irradiation. Planar-patterned CrPt 3 nanodots with various bit sizes from 200 nm to 50 nm were successfully fabricated by 30 keV Kr + ion irradiation at a dose of 2 Â 10 14 ions/cm 2 , where e-beam lithography was used for creating the resist mask. We have confirmed that the nanofabrication process didn't change the magnetic properties of CrPt 3 ordered L1 2 alloy films. As-prepared film exhibited perpendicular hysteresis loop with the coercivity of 5.5 kOe. The typical perpendicular maze domain structure with the stripe structure was clearly seen in as-prepared CrPt 3 film. Magnetic force microscopy (MFM) images of patterned CrPt 3 nanodots indicated that each un-irradiated bit consists of localized perpendicular magnetic domain structures, which corresponds to perpendicular magnetization direction. Nanodots with bit size 680 nm show either dark or bright contrast, suggesting single domain structure. No magnetic contrast in irradiated space is due to the suppressing of the magnetization by Kr + ion irradiation.

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“…6 The CrPt 3 (111) surface shows a strong perpendicular magnetic anisotropy, while the CrPt 3 (001) surface a week perpendicular magnetic anisotropy. 7 For some MPt 3 the crystal structure at their ground states is L1 2 and for the others it is D0 22 . The stable structure of CrPt 3 is known to be L1 2 .…”

Section: Introductionmentioning

confidence: 99%

Magnetic structures of CrPt3 by first-principles calculations

Kwon

Rho

Lee

et al. 2003

Journal of Applied Physics

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In order to investigate systematically the magnetic structures of CrPt3, four different magnetic structures of ferrimagnetism (FIM), A-, C-, and G-type antiferromagnetism (AFM) for L12 structure and two different ones of FIM and A-type AFM for D022 structure were calculated. The full-potential linearized augmented plane wave (FLAPW) method was employed to solve Kohn–Sham equation self-consistently, using general gradient approximation for exchange-correlation potential. We found that L12 FIM is most stable among all of the aforementioned states. For D022, AFM is more stable than FIM by a significant energy difference (102 meV/Cr–atom). For D022 AFM the coupling between Cr and Pt atoms is ferromagnetic unlike FIM. The calculated magnetic moments are calculated to 2.78, 2.81, 2.81, and 2.88 μB for FIM, A-, C-, and G-type AFM in L12, and 2.36, 2.59 μB for FIM and AFM in D022, respectively. The magnetism is proven to be very sensitive to a crystal structure.

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Magnetic anisotropy and chemical long-range order in epitaxial ferrimagnetic CrPt3 films

Cited by 28 publications

References 21 publications

Self-assembling of alloy nanostructures on van der Waals surfaces

Self-assembling of alloy nanostructures on van der Waals surfaces

Nanoscale patterning of CrPt 3 magnetic thin films by using ion beam irradiation

Magnetic structures of CrPt3 by first-principles calculations

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