A study of the LaMn2−xCuxGe2 (0 ≤ x ≤ 1) solid solution by magnetization and neutron diffraction measurements

Norlidah, M.N.; Venturini, G.; Malaman, B.; Ressouche, E.

doi:10.1016/s0925-8388(96)02410-3

Cited by 26 publications

(16 citation statements)

References 24 publications

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“…This effect is clearly observed in LaMn 2-x Cu x Ge 2 [13], LaMn 2-x Fe x Si 2 [22], NdMn 2-x Fe x Ge 2 [23] and PrMn 2-x Fe x Ge 2 [16], where a number of magnetic transitions are found within the temperature range of about 400 K down to the lowest temperatures. This paper deals with the crystal structure and the magnetic properties of the PrMn 2-…”

Section: Introductionmentioning

confidence: 81%

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XRD, AC susceptibility and DSC studies of PrMn _2–x Ni _x Ge ₂ compounds

Kervan

Kılıç

Gençer

2004

phys. stat. sol. (c)

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PACS 61.66.Fn, 75.30.Cr, 75.50.-y X-ray powder diffraction, AC susceptibility and differential scanning calorimetry (DSC) studies were performed on the polycrystalline PrMn 2-x Ni x Ge 2 (0≤x≤1) compounds. Substitution of Ni for Mn leads a linear decrease in the lattice constant c and the unit cell volume, while it gives rise a change of magnetic properties from ferromagnetic to anti-ferromagnetic behavior for small values of x<1. The samples with x=0.8 and 1.0 have a Néel temperature of about 33 K and 35 K, respectively. The samples with low Ni concentration are ferromagnetic and show an additional increase in the susceptibility. The substitution of nonmagnetic Ni for Mn weakens strength of the molecular field acting on Mn layers, yielding decrease of Curie temperature. The results lead to the construction of the partial x-T magnetic phase diagram.

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Section: Introductionmentioning

confidence: 81%

“…The nature of the magnetic coupling within and between the Mn layers in these compounds is closely related to the in-plane Mn-Mn spacing a Mn Mn d − . A detailed discussion of the magnetic behavior as a function of Mn-Mn spacing were given in previous publications [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

XRD, AC susceptibility and DSC studies of PrMn _2–x Ni _x Ge ₂ compounds

Kervan

Kılıç

Gençer

2004

phys. stat. sol. (c)

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“…When Mn is substituted by other 3d elements in RMn 2 X 2 compounds, the Curie and Néel temperatures associated with the Mn sublattice drop with increasing transition metal content. This effect is clearly observed in LaMn 2-x Cu x Ge 2 [10], LaMn 2-x Fe x Ge 2 [8], LaMn 2-x Fe x Si 2 [11], where a number of magnetic transitions are found within the temperature range of about 400 K down to the lowest temperatures. This paper deals with the crystal structure and the magnetic phase diagram of the LaMn 2-x Co x Ge 2 compounds to elucidate the effects of the Co substitution for Mn.…”

Section: Introductionmentioning

confidence: 82%

Magnetic characterization of LaMn _2–x Co _x Ge ₂ compounds

Kılıç

Kervan

Gençer

2004

phys. stat. sol. (c)

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The structural and magnetic properties of the LaMn 2-x Co x Ge 2 (0≤x≤1) compounds have been investigated by means of X-ray powder diffraction, AC susceptibility and differential scanning calorimetry (DSC) studies. All the compounds investigated crystallize in the body-centered-tetragonal ThCr 2 Si 2 -type structure with the space group I4/mmm. Substitution of Co for Mn leads to a linear decrease of the lattice constants and the unit cell volume. The samples with low Co concentration are ferromagnetic. The substitution of nonmagnetic Co for Mn weakens the strength of the molecular field acting on the Mn layers, yielding a decrease of the Curie temperature. The results lead to the construction of the partial x-T magnetic phase diagram.

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“…The in-plane antiferromagnetism can be commensurate or incommensurate with the lattice periodicity. When R is a heavy rare-earth element in RMn 2 Ge 2 , the moments in the Mn layers align parallel along the c-axis, and there is no in-plane component [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%