3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

Deryagin, A.V.

doi:10.1051/jphyscol:1979562

Cited by 24 publications

(14 citation statements)

References 7 publications

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“…However, it seems that m orb 4f is even now for about m B below its true value. Total magnetic moment per formula unit is about 9 m B (for example, for U ¼ 0:6 Ry total magnetic moment per formula unit is 9.09 m B ) while measurements on single crystals resulted with a range between 10.4 and 11.1m B [34][35][36][37] and also reflect a discrepancy between results of our calculation and experimental data.…”

Section: Lsda-soc Calculationscontrasting

confidence: 67%

“…HoCo 5 total magnetic moment is 0.97 m B /f.u., while the experimental value obtained on single crystal is 2.06 m B /f.u [36]. Results include energy differences between ferromagnetic and ferrimagnetic configurations of 4f and 3d spin sublattices ðDEÞ, the corresponding effective exchange fields ðB ex Þ and 4f spin and orbital moments for ferrimagnetic configuration of 4f and 3d spin sublattices.…”

Section: Lsda-soc Calculationsmentioning

confidence: 99%

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Magnetic properties of and from the electronic structure calculations

Miletić

Blažina

2009

Journal of Magnetism and Magnetic Materials

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Section: Lsda-soc Calculationscontrasting

confidence: 67%

Section: Lsda-soc Calculationsmentioning

confidence: 99%

Magnetic properties of and from the electronic structure calculations

Miletić

Blažina

2009

Journal of Magnetism and Magnetic Materials

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“…7:32) of the system. Change in the electronic structure is also reflected in 5d If one compares total magnetic moment obtained on a single crystal [17] of 1:71 m B with the LSDA þ U value of 0.39 (U 4f ¼ 0:5 Ry), a disagreement also exists. It seems that the present LSDA þ U calculations underestimate to some extent 4f orbital moment.…”

Section: Article In Pressmentioning

confidence: 98%

Magnetic order in and from the electronic structure calculations

Miletić

Blažina

2009

Journal of Magnetism and Magnetic Materials

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“…In addition, the study of extrinsic magnetic properties of the Pr 2 Co 7 compound revealed the existence of a large coercive field of about 18 kOe at 293 K and 23 kOe at 10K, a high remanent magnetization and an important saturation magnetization M S [3]. These performances are due to the combination of the complementary characteristics of 3d-itinerant and 4f-localized magnetism of Co and the rare earth (Pr, Sm,...), a e-mail : FERSI@glvt-cnrs.fr respecively [4]. The reason for the high T C is due to the predominance of the interactions Co-Co [5,6].…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe substitution on structural and magnetic properties of Pr₂Co_7-xFe_xcompounds

Fersi

Mliki

Bessaïs

2012

EPJ Web of Conferences

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Abstract. This work focuses on the synthesis, structure, and magnetic properties of PrCo-Fe compounds. Our previous study of Pr 2 Co 7 alloys with high coercivity is shown that for samples annealed at T a = 800 °C, the main phase is hexagonal of the Ce 2 Ni 7 type structure. This leads to the formation of a magnetically hard Pr 2 Co 7 phase; the coercivity being equal to 18 kOe at 293 K and 23 kOe at 10 K and important saturation magnetization. These performances are due to the combination of the complementary characteristics of 3d-itinerant and 4f-localized magnetism of Co and Pr, respectively. Its Curie temperature is about 600 K. The aim of this study is to follow the effect of partial substitution of Co by Fe on Pr 2 Co 7-x Fe x structural and magnetic properties, where x = 0.25, 0.50, 0.75 and 1. These compounds were synthesized by mechanical alloying. The Rietveld analysis of DRX shows that these intermetallics, annealed at T a = 700 °C, adopt mainly hexagonal Ce 2 Ni 7 type structure with P6 3 /mmc group space. Moreover, it points out a lattice expansion along the c axis after Fe substitution for Co. Furthermore, these hexagonal phases possess magnetic properties more attractive than Pr 2 Co 7 , the Curie temperatures are higher than Pr 2 Co 7 ones and the highest is obtained for x = 0.5 where T C = 760 K. This increase is due to the well-known electronic effect that invokes the reduction of antiferromagnetic coupling. These phases are particularly promising for permanent magnet applications.

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3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

Cited by 24 publications

References 7 publications

Magnetic properties of and from the electronic structure calculations

Magnetic properties of and from the electronic structure calculations

Magnetic order in and from the electronic structure calculations

Effect of Fe substitution on structural and magnetic properties of Pr₂Co_7-xFe_xcompounds

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3d-4f METALLIC COMPOUNDS.Magnetic moment, magnetic anisotropy and spin-reorientation phase transition in (4f-3d)-intermetallic compounds

Cited by 24 publications

References 7 publications

Magnetic properties of and from the electronic structure calculations

Magnetic properties of and from the electronic structure calculations

Magnetic order in and from the electronic structure calculations

Effect of Fe substitution on structural and magnetic properties of Pr2Co7-xFexcompounds

Contact Info

Product

Resources

About

Effect of Fe substitution on structural and magnetic properties of Pr₂Co_7-xFe_xcompounds