Antiferromagnetism of FCC Fe thin films

Keune, W.; Halbauer, R.; Gonser, U.; Lauer, J. L.; Williamson, D. L.

doi:10.1016/0304-8853(77)90107-x

Cited by 28 publications

(6 citation statements)

References 16 publications

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“…In Cu precipitates γ-iron can be stabilized till very low temperatures, which allows studying its low-temperature magnetic properties. Early experimental studies have shown that this substance is a weak itinerant antiferromagnet with the Neel temperature of the order of 100 K [4][5][6]. Later it was found [7][8][9] that the corresponding incommensurate wave vector Q ≈ 2π(1, 0.13, 0) in units of inverse lattice parameter a is close to the so called AFM-I magnetic structure.…”

Section: Introductionmentioning

confidence: 90%

Magnetic exchange and susceptibilities in fcc iron: A supercell dynamical mean-field theory study

2018

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We study the momentum-and temperature dependencies of magnetic susceptibilities and magnetic exchange in paramagnetic fcc iron by a combination of density functional theory and supercell dynamical mean-field theory (DFT+DMFT). We find that in agreement with experimental results the antiferromagnetic correlations with the wave vector close to (0, 0, 2π) dominate at low temperatures (as was also obtained previously theoretically), while the antiferromagnetic and ferromagnetic correlations closely compete at the temperatures T ∼ 1000 K, where γ-iron exists in nature. Inverse staggered susceptibility has linear temperature dependence at low temperatures, with negative Weiss temperature θstagg ≈ −340 K; the inverse local susceptibility is also linear at not too low temperatures, showing well formed local moments. Analysis of magnetic exchange shows that the dominant contribution comes from first two coordination spheres. In agreement with the analysis of the susceptibility, the nearest-neighbor exchange is found to be antiferromagnetic at low temperatures, while at temperature of the α-γ structural phase transition its absolute value becomes small, and the system appears on the boundary between the regimes with strongest antiferro-and ferromagnetic correlations.

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Section: Introductionmentioning

confidence: 90%

Magnetic exchange and susceptibilities in fcc iron: A supercell dynamical mean-field theory study

2018

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“…Antiferromagnet ordering in g (FCC) Fe thin films [12][13][14], g (FCC) Fe precipitates in Cu and 304 stainless steel [10] (all are paramagnetic at room temperature (RT) and show a single line M .…”

Section: Introductionmentioning

confidence: 99%

“…The N! eel temperature (T N ) in these materials was determined using either the ''thermal scan'' method [10,12], or by measuring the linewidth as a function of temperature [13,14].…”

Section: Introductionmentioning

confidence: 99%

Coexisting antiferromagnetism and ferromagnetism in mechanically alloyed Fe-rich Fe–Ni alloys: implications regarding the Fe–Ni phase diagram below 400°C

Abdu

Ericsson

Annersten

2004

Journal of Magnetism and Magnetic Materials

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“…The weakening of the main ESR lines, g 1 and g 2 , with decreasing temperature indicates the emergence of an anisotropic antiferromagnetic (AF) order at a Néel temperature T N ≈ 260 K (Figure b). An AF order with a Néel temperature T N up to 100 K was reported for γ‐Fe thin films with face‐centered cubic (fcc) crystal symmetry obtained by epitaxial growth or precipitation, an AF order can emerge when bcc γ‐Fe undergoes a crystal phase transition to fcc below a critical layer thickness due to stronger magnetic interactions arising from a smaller lattice constant and/or surface effects; AF and FM orders can also coexist within an Fe‐cluster due to its composite crystal structure . The coexistence of different magnetic phases in our system may arise from nonequivalent Fe‐atoms in the islands and strain effects at the interface with the diamagnetic InSe, which requires further investigation.…”

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confidence: 70%

Room Temperature Uniaxial Magnetic Anisotropy Induced By Fe‐Islands in the InSe Semiconductor Van Der Waals Crystal

et al. 2018

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The controlled manipulation of the spin and charge of electrons in a semiconductor has the potential to create new routes to digital electronics beyond Moore's law, spintronics, and quantum detection and imaging for sensing applications. These technologies require a shift from traditional semiconducting and magnetic nanostructured materials. Here, a new material system is reported, which comprises the InSe semiconductor van der Waals crystal that embeds ferromagnetic Fe‐islands. In contrast to many traditional semiconductors, the electronic properties of InSe are largely preserved after the incorporation of Fe. Also, this system exhibits ferromagnetic resonances and a large uniaxial magnetic anisotropy at room temperature, offering opportunities for the development of functional devices that integrate magnetic and semiconducting properties within the same material system.

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Antiferromagnetism of FCC Fe thin films

Cited by 28 publications

References 16 publications

Magnetic exchange and susceptibilities in fcc iron: A supercell dynamical mean-field theory study

Magnetic exchange and susceptibilities in fcc iron: A supercell dynamical mean-field theory study

Coexisting antiferromagnetism and ferromagnetism in mechanically alloyed Fe-rich Fe–Ni alloys: implications regarding the Fe–Ni phase diagram below 400°C

Room Temperature Uniaxial Magnetic Anisotropy Induced By Fe‐Islands in the InSe Semiconductor Van Der Waals Crystal

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