The influence of Ti on the itinerant magnetism of RTX compounds

Никитин, С.А.; Tskhadadze, I.A; Морозкин, А.В.; Seropegin, Yu. D.

doi:10.1016/s0304-8853(98)00880-4

Cited by 17 publications

(10 citation statements)

References 5 publications

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“…Such substitutions have not been explored in pseudo-ternary RT X materials that adopt CeScSi-and CeFeSi-types as parent structures. To date, the effect of Mn substitutions in GdTiGe (CeScSi-type), GdTi 1−x Mn x Ge, and in GdTiSi (CeFeSi-type), GdTi 1−x Mn x Si, has been reported [14,15]. But in the former case the parent GdM-nGe is orthorhombic and its crystal structure is not directly related to that of GdTiGe, while in the latter the phase boundaries remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds

Guillou

Pathak

Hackett

et al. 2017

J. Phys.: Condens. Matter

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Experimental investigations of crystal structure, magnetism and heat capacity of compounds in the pseudoternary GdScGe-GdScSb system combined with density functional theory projections have been employed to clarify the interplay between the crystal structure and magnetism in this series of RTX materials (R = rare-earth, [Formula: see text] = transition metal and X = p-block element). We demonstrate that the CeScSi-type structure adopted by GdScGe and CeFeSi-type structure adopted by GdScSb coexist over a limited range of compositions [Formula: see text]. Antimony for Ge substitutions in GdScGe result in an anisotropic expansion of the unit cell of the parent that is most pronounced along the c axis. We believe that such expansion acts as the driving force for the instability of the double layer CeScSi-type structure of the parent germanide. Extensive, yet limited Sb substitutions [Formula: see text] lead to a strong reduction of the Curie temperature compared to the GdScGe parent, but without affecting the saturation magnetization. With a further increase in Sb content, the first compositions showing the presence of the CeFeSi-type structure of the antimonide, [Formula: see text], coincide with the appearance of an antiferromagnetic phase. The application of a finite magnetic field reveals a jump in magnetization toward a fully saturated ferromagnetic state. This antiferro-ferromagnetic transformation is not associated with a sizeable latent heat, as confirmed by heat capacity measurements. The electronic structure calculations for [Formula: see text] indicate that the key factor in the conversion from the ferromagnetic CeScSi-type to the antiferromagnetic CeFeSi-type structure is the disappearance of the induced magnetic moments on Sc. For the parent antimonide, heat capacity measurements indicate an additional transition below the main antiferromagnetic transition.

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Section: Introductionmentioning

confidence: 99%

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds

Guillou

Pathak

Hackett

et al. 2017

J. Phys.: Condens. Matter

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“…In CeFeSi-type structure, atoms can be arranged in the sequence R-X-T2-X-R, which shows that R atom in such type of structure is separated by X and T atoms. Thus the hybridization between p and d states of X and T elements, respectively, try to fill 3d up and 3d down sub-bands [152]. In the study of CeFeSi-type structure, the authors have considered three R-R exchange interactions, these interactions are: J0 within the R planes, J1 between R planes separated by T and X planes (BaAl4 block) and J2 between nearest R planes (W block) [8].…”

Section: Rtix Compoundsmentioning

confidence: 99%

“…It is very surprising that though Ti and Si are non-magnetic, the ordering temperature is very high. To understand this behavior Nikitin et al [152] substituted Ti in place of Mn in GdMnSi compound. It has been observed that substitution of Ti at Mn place, increases the TC and the paramagnetic Curie temperature (θp) of the compounds.…”

Section: Rtix Compoundsmentioning

confidence: 99%

Review on magnetic and related properties of RTX compounds

Gupta

Суреш

2015

Journal of Alloys and Compounds

257

124

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RTX (R=rare earths, T= 3d/4d/5d, transition metals such as Sc, Ti, Mn, Fe, Co, Ni, Cu, Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, and X=p-block elements such as Al, Ga, In, Si, Ge, Sn, As, Sb, Bi) series is a huge family of intermetallics compounds. These compounds crystallize in different crystal structures depending on the constituents. Though these compounds have been known for a long time, they came to limelight recently in view of the large magnetocaloric effect (MCE) and magnetoresistance (MR) shown by many of them. Most of these compounds crystallize in hexagonal and tetragonal crystal structures. Some of them show crystal structure modification with annealing temperature; while a few of them show iso-structural transition in the paramagnetic regime. Their magnetic ordering temperatures vary from very low temperatures to temperatures well above room temperature (~510 K). Depending on the crystal structure, they show a variety of magnetic and electrical properties.These compounds have been characterized by means of a variety of techniques/measurements such as x-ray diffraction, neutron diffraction, magnetic properties, heat capacity, magnetocaloric properties, electrical resistivity, magnetoresistance, thermoelectric power, thermal expansion, Hall effect, optical properties, XPS, Mössbauer spectroscopy, ESR, μSR, NMR, NQR etc. Some amount of work on theoretical calculations on electronic structure, crystal field interaction and exchange interactions has also been reported. The interesting aspect of this series is that they show a variety of physical properties such as Kondo effect, heavy fermion behavior, spin glass state, intermediate valence, superconductivity, multiple magnetic transitions, metamagnetism, large MCE, large positive as well as negative MR, spin orbital compensation, magnetic polaronic behavior, pseudo gap effect etc.Except Mn, no other transition metal in these compounds possesses considerable magnetic moments.Because of this RMnX compounds in general have high ordering temperatures. Interstitial modification using hydrogen and nitrogen is found to alter their crystal structures and magnetic properties considerably. RTX compounds also show interesting pressure effects on their structural and magnetic properties. In summary, these compounds show variety of physical properties over a wide range of temperatures. This review is intended to cover all the important results obtained in this family, particularly in the last few years.

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“…From the measurements of the magnetization of the GdMnSi single crystal and calculations of its magnetic structure at low temperatures, we have succeeded to define a hierarchy of exchange interactions in this compound. It turned out that in GdMnSi the strong interactions within Mn and Gd sublattices coexist with the weak intersublattice interaction Gd-Mn [3]. A similar situation can be expected for isostructural compounds RMnX with other R and X atoms [4,5].…”

Section: Introductionmentioning

confidence: 66%

“…A negative interaction between Nd atoms located in the planes separated by the Mn and Ge layers occurs at low temperatures [4]. An analysis of the magnetic data for isostructural compounds RMnX [3,4] shows that in compounds with small R-R distances the antiferromagnetic coupling between the R layers occurs, whereas the increase in these distances leads to the ferromagnetic coupling. Probably, the lattice parameters of the NdMnGe compound are near the critical distance, as a result temperature decreasing leads to a decrease in the cell volume and the negative exchange interactions increase.…”

Section: Discussionmentioning

confidence: 97%

The Influence of Substitutions in 3d-Sublattice on the Exchange Interactions in Compounds Based on NdMnGe

et al. 2016

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Magnetic properties of CeFeSi-type NdMn 1−x Ti x Ge compounds studied by magnetization and magnetocaloric measurements are reported. The increase in Ti content leads to the essential increase in magnetic ordering temperature of the Nd sublattice and the magnetocaloric effect. The results are compared with those obtained on isotypic RTX compounds and discussed assuming the itinerant character of magnetism of these compounds.

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The influence of Ti on the itinerant magnetism of RTX compounds

Cited by 17 publications

References 5 publications

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds

Review on magnetic and related properties of RTX compounds

The Influence of Substitutions in 3d-Sublattice on the Exchange Interactions in Compounds Based on NdMnGe

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The influence of Ti on the itinerant magnetism of RTX compounds

Cited by 17 publications

References 5 publications

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe1–xSbxcompounds

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe1–xSbxcompounds

Review on magnetic and related properties of RTX compounds

The Influence of Substitutions in 3d-Sublattice on the Exchange Interactions in Compounds Based on NdMnGe

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Product

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Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds

Crystal, magnetic, calorimetric and electronic structure investigation of GdScGe_1–xSb_xcompounds