Electronic structure and magnetism of Gd5(Si, Ge)4 compounds

Szade, J.; Skorek, Grzegorz

doi:10.1016/s0304-8853(98)00904-4

Cited by 44 publications

(36 citation statements)

References 3 publications

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“…Many of the ongoing investigations have focused on this particular aspect with an aim to utilize these materials in the environmentfriendly, magnetic refrigeration technology. Moreover, several efforts are being made to understand the underlying physics of magnetic transitions and electrical transport in such compounds [6][7][8]. A canted antiferromagnetic structure has been proposed for Pr 5 Si x Ge 4Àx compounds [3] whereas a ferromagnetic transition is observed in Tb 5 Si x Ge 4Àx compounds [9].…”

Section: Introductionmentioning

confidence: 98%

Magnetic and electrical transport properties of DyxGd5−xSi2Ge2 (x=0.0, 1.5, 2.5, 3.0, 3.5, 4.5 and 5.0) compounds

Nirmala

Sankaranarayanan

Sethupathi

et al. 2007

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 98%

Magnetic and electrical transport properties of DyxGd5−xSi2Ge2 (x=0.0, 1.5, 2.5, 3.0, 3.5, 4.5 and 5.0) compounds

Nirmala

Sankaranarayanan

Sethupathi

et al. 2007

Journal of Magnetism and Magnetic Materials

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“…Distinct FM and even antiferromagnetic arrangements were already considered. 2,6,7 In this work we present experimental results on electron spin resonance ͑ESR͒ measurements on the Gd 5.09 Ge 2.03 Si 1.88 compound as a function of temperature. This alloy has the stoichiometry of the majority phase of the Gd 5 Ge 2 Si 2 alloy as determined by wavelength dispersive spectroscopy ͑WDS͒.…”

Section: Introductionmentioning

confidence: 99%

Electron spin resonance and magnetic characterization of theGd5.09Ge2.03Si1.88

et al. 2005

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Electron spin resonance was applied on samples of Gd 5.09 Ge 2.03 Si 1.88 . The results are discussed under the scope of magnetization measurements, optical metallography, and wavelength dispersive spectroscopy. Polycrystalline arc-melted samples submitted to different heat treatments were investigated. The correlation of the electron spin resonance and magnetization results permitted a characterization of the present phases and their transitions. Two coexisting phases in the temperature range between two phase transitions have been identified and associated to distinct crystallographic phases. Additionally, the magnetic moment at high temperatures has been estimated from the measured effective g factor. A peak value of 21.5 J / kg K for the magnetocaloric effect was obtained for a sample heat treated at 1500°C for 16 h.

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“…18 Consequently, short-range FM correlations appear along the phase diagram, including a GL phase as a paradigmatic example. 9,14,17 In this paper, we study the GL phase by means of ac susceptibility at several low-dc fields and frequencies. We show that the onset of the GL phase takes place in the PM region, yielding an effective critical slowing down associated with competing AFM and FM magnetic correlations.…”

Section: Introductionmentioning

confidence: 99%

“…The intermetallic compound Gd 5 Ge 4 has recently received much attention [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] due to the unusual magnetic behavior originating from the competition of ferromagnetic (FM) and antiferromagnetic (AFM) interactions present in its layered crystal structure. 1 One of the most interesting features is the field-induced metamagnetic transition between AFM and FM states, which is coupled to a structural change 2 that gives the first-order nature of the transition.…”

Section: Introductionmentioning

confidence: 99%

Griffiths-like phase and magnetic correlations at high fields in Gd5Ge4

et al. 2011

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Magnetic correlations appearing in polycrystalline Gd 5 Ge 4 are studied. On the one hand, ac susceptibility measurements as functions of temperature at several dc fields and frequencies show the existence of ferromagnetic (FM) and antiferromagnetic (AFM) correlations in the paramagnetic (PM) region, where a Griffiths-like phase appears below ∼225 K. The value for the effective magnetic moment within the Griffiths-like phase is 10.1 μ B . FM correlations also extended all the way into the AFM phase below ∼127 K. The onset of the Griffiths-like phase is associated with an effective critical slowing down. On the other hand, high field magnetization measurements reveal the presence of FM and AFM correlations in the three magnetic phases (PM, FM, and AFM), giving rise to a variety of mixed magnetic states. In particular, at high fields the magnetostructural transition takes place in several stages that extend along a wide temperature range. A three-dimensional (T ,H,M) phase diagram is proposed, including the new experimental findings.

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Electronic structure and magnetism of Gd5(Si, Ge)4 compounds

Cited by 44 publications

References 3 publications

Magnetic and electrical transport properties of DyxGd5−xSi2Ge2 (x=0.0, 1.5, 2.5, 3.0, 3.5, 4.5 and 5.0) compounds

Magnetic and electrical transport properties of DyxGd5−xSi2Ge2 (x=0.0, 1.5, 2.5, 3.0, 3.5, 4.5 and 5.0) compounds

Electron spin resonance and magnetic characterization of theGd5.09Ge2.03Si1.88

Griffiths-like phase and magnetic correlations at high fields in Gd5Ge4

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