Magnetic property of the face center cubic iron with different lattice parameter in Fe/Pd multilayers

Pan, Feng; Zhang, Z.S.

doi:10.1016/s0921-4526(00)00560-3

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…This result also agrees well with some theoretical studies of fcc Fe [22,23]. Fcc Fe has a lower total energy when it is close to a high-spin (HS) metastable ferromagnetic state, and the films showed a higher magnetic moment [24]. When t Co is thicker than 3.0 nm the structure of Co returns to the hcp structure, which contributes less to the increase of magnetization, so the magnetic moment per Co atom decreases gradually.…”

Section: Magnetic Propertiessupporting

confidence: 91%

The Effects of Layer Thickness on the Microstructure and Magnetic Properties of Evaporated Co/Ag Films

Yang

Chen

Pan

2002

phys. stat. sol. (a)

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Co/Ag multilayers with various Co and Ag layer thicknesses were prepared by alternate vapor deposition of pure Co and Ag. The effect of constituent metal layer thickness on the microstructure and magnetic properties of the films was investigated by transmission electron microscopy, Rutherford backscattering, X‐ray diffraction, and vibrating sample magnetometry. The experimental results show that Co layers grow in an fcc structure with the proper relative thickness of constituent metals. The saturation magnetization and coercive force of the multilayers change significantly with layer thickness of Co and Ag. The mechanisms responsible for the phenomena are discussed.

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Section: Magnetic Propertiessupporting

confidence: 91%

The Effects of Layer Thickness on the Microstructure and Magnetic Properties of Evaporated Co/Ag Films

Yang

Chen

Pan

2002

phys. stat. sol. (a)

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“…42 Celinski et al 44 also found metastable fct Fe at the Fe/Pd interface of ultrathin Fe͑001͒/Pd͑001͒/Fe͑001͒ sandwich structures. The formation of two fcc-Fe phases with different lattice parameters in e-beam evaporated Fe/Pd multilayers was recently reported by Pan et al, 45 and a correlation between microstructure and magnetism was inferred. Other groups, however, reported the stabilization of interfacial ultrathin Fe films with bct structure on Pd͑100͒, 46 on Fe/Pd multilayers, 20 and on Pd overlayers supported on Ag͑001͒.…”

Section: Introductionmentioning

confidence: 55%

Enhanced hyperfine magnetic fields for face-centered tetragonal Fe(110) ultrathin films on vicinal Pd(110)

Cuenya

Keune

et al. 2005

Phys. Rev. B

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The structure and hyperfine magnetic properties of epitaxial Fe ultrathin films on a vicinal Pd͑110͒ surface have been investigated by means of low-energy electron diffraction ͑LEED͒, reflection high-energy electron diffraction ͑RHEED͒ and 57 Fe conversion electron Mössbauer spectroscopy ͑CEMS͒. LEED and RHEED provide evidence for initial pseudomorphic film growth. The RHEED determination of the in-plane atomic distance versus Fe film thickness demonstrates the stabilization of the metastable fcc-like Fe structure on Pd͑110͒. This interpretation is supported by in situ 57 Fe CEMS measurements which indicate an enhanced saturation hyperfine field of ϳ39 T for a 3-monolayers-thick Fe film at 25 K. This is the highest value ever measured for Fe on a metallic substrate. Our results suggest that ultrathin fcc-like ͑face-centered tetragonal͒ Fe films on Pd͑110͒ are in a ferromagnetic high-moment state with an enhanced hyperfine field due to electronic 3d-4d hybridization at the Fe/Pd interface.

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“…There is some experimental evidence for a FM phase at large c/a values. In two recent papers on Fe/Pd multilayers, 14,15 such FM phases are reported. At the lattice constant of Pd, epitaxial films of Fe would be in the range in which the FM phase has the lowest energy.…”

Section: Discussionmentioning

confidence: 99%

Epitaxial Bain path of tetragonal Fe

Qiu

Marcus

2001

Phys. Rev. B

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The epitaxial Bain paths ͑EBP's͒ of tetragonal Fe are found by minimizing the total energy with respect to c at each a using first-principles total-energy calculations with the local-spin-density approximation plus a generalized gradient approximation and relativistic corrections. The energy minima along the EBP's give the equilibrium states of the ferromagnetic, nonmagnetic and two antiferromagnetic phases-the type-I phase, called here AF1, and a phase in which pairs of ferromagnetically coupled ͑001͒ layers alternate in moment, called here AF2. The AF2 phase is found to be lower in energy than AF1 when each is in equilibrium and also when the ͑001͒ plane lattice constant is strained to the Cu͑001͒ lattice constant. Calculations of the six elastic constants of AF2 at equilibrium inserted in the four tetragonal stability conditions show that it is unstable for ͓100͔ and ͓010͔ shears in the ͑001͒ plane, but is stabilized by epitaxy on Cu͑001͒. The AF2 phase is indicated to be the phase of the bulk of epitaxial Fe films on Cu͑001͒. The bulk structure of Fe films on Cu͑001͒ found by quantitative low-energy electron diffraction analysis is shown to be close to the EBP's of the AF1 phase, but farther from the AF2 phase. On substrates with slightly larger lattice constants than Cu͑001͒, the ferromagnetic phase is found to be more stable than AF2.

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Magnetic property of the face center cubic iron with different lattice parameter in Fe/Pd multilayers

Cited by 13 publications

References 21 publications

The Effects of Layer Thickness on the Microstructure and Magnetic Properties of Evaporated Co/Ag Films

The Effects of Layer Thickness on the Microstructure and Magnetic Properties of Evaporated Co/Ag Films

Enhanced hyperfine magnetic fields for face-centered tetragonal Fe(110) ultrathin films on vicinal Pd(110)

Epitaxial Bain path of tetragonal Fe

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