Simple cubic antiferromagnet Pt3Fe alloy under uniaxial pressure

Yano, Suguru; Tsunoda, Yorihiko

doi:10.1016/j.jmmm.2006.10.627

Cited by 7 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The relative ground state energies for all investigated magnetic structures of Pt 3 Fe are shown in Table II. Our calculations have proved that the ground state magnetic order of Pt 3 Fe is of noncollinear type, what confirms the recent neutron spectroscopy measurements [3]. For the AFM type of magnetic order, the sequence of the calculated ground state energies (AFM 2 -higher, AFM 1lower energy) correctly reproduce the order of the magnetic phase transition temperatures (T N > T S ).…”

Section: Resultssupporting

confidence: 88%

“…Some details of the M. Wainert formulation we discussed in [12]. For the orientation of the local magnetic moments we assumed the construction proposed in [3] on the basis of the neutron scattering measurements. The idea behind this construction is that two types of AFM 1 correlations, (1/2,0,0) and (0,1/2,0), (degenerated, as we proved by ab initio calculations) couple giving rise to the noncollinearity in local magnetic moment orientations within the x-y plane.…”

Section: Computational Detailsmentioning

confidence: 99%

“…Early neutron diffraction studies [2] have shown that below T N = 160 K the Pt 73,3 Fe 26,7 exhibits the long range antiferromagnetic order of (1/2,1/2,0)-type (AFM 2 ), but with decreasing temperature, at around T S = 110 K, the component of antiferromagnetic order of (1/2,0,0)-type (AFM 1 ) develops. Recent neutron scattering investigations of Pt 3 Fe have shown that below T S the noncollinear magnetic order develops in the compound [3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Noncollinear Magnetic Order on the Hyperfine Interactions in Pt₃Fe

2011

View full text Add to dashboard Cite

The investigations of the hyperfine interactions in Pt3Fe with the noncollinear magnetic order by means of ab initio methods are presented. It is shown that the ground state magnetic order of Pt3Fe is of noncollinear character. Electric field gradient and hyperfine magnetic field at 57 Fe nucleus were calculated and their dependence on the strength of Coulomb correlation interaction is discussed. The calculated values of electric field gradient correspond with the experimental data and the best agreement was found when the enhanced Coulomb correlation interaction for 3d-states of Fe was considered. Lattice, local valence electron (3d, 4p) and weakly bound 3p semicore electron contributions to electric field gradient are separated out and discussed.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Computational Detailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Noncollinear Magnetic Order on the Hyperfine Interactions in Pt₃Fe

2011

View full text Add to dashboard Cite

show abstract

“…Unfortunately, however, experimental evidence to verify the degenerate spin-density-wave (SDW) formation had not been reported in the system. Recently, one of the present author and colleague [6] studied the magnetic structure of Pt 3 Fe ordered alloy using a single domain single crystal under a uniaxial stress and demonstrated the validity of the uniform model with a non-collinear magnetic structure for the low temperature phase of Pt 3 Fe alloy. The resultant structure is shown in figure 2.…”

Section: Introductionmentioning

confidence: 83%

Spin correlations in a simple cubic antiferromagnet L1₂-type Pt₃Fe

Matsui¹,

Tsunoda²

2009

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Magnetic diffuse scattering of neutrons was studied for a simple cubic antiferromagnet L1(2)-type Pt(3)Fe alloy in a paramagnetic phase. In order to visualize the physics, the data were analyzed using a localized spin model and effective exchange coupling parameters were determined. The result shows a special feature of exchange couplings; the first neighbor coupling constant J(1) has almost the same value and the same sign as that of the second neighbor J(2). This fact explains well coexistence of the (1/2 1/2 0)-type and (1/2 0 0)-type magnetic structures in the low temperature phase of Pt(3)Fe alloy.

show abstract

“…The non-collinear magnetic structure in Pt 3 Fe was also reported from low--temperature neutron diffraction data [3]. The compound was measured by the Mössbauer effect method [4] but no information on the electric field gradient (EFG) tensor was reported.…”

Section: Introductionmentioning

confidence: 99%