Structural and magnetic properties of Lu2Fe17Hx (x=0; 3) single crystals

Терешина, И. С.; Никитин, С.А.; Stȩpień‐Damm, J.; Gulay, L. D.; Pankratov, N. Yu.; Salamova, Amina; Verbetsky, V.N.; Suski, W.

doi:10.1016/s0925-8388(01)01620-6

Cited by 38 publications

(28 citation statements)

References 9 publications

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“…Labels of Er and Fe atomic coordinates correspond to those used in the International Tables for Crystallography. 62 It is noteworthy that several refinements using the disordered Th 2 Ni 17 -type crystal structure (which is found in other hexagonal R 2 Fe 17 compounds) 38,63,64 were carried out, but led to results with poor reliability factors and unphysical results.…”

Section: Crystal and Magnetic Structures Of Er 2 Fe 17mentioning

confidence: 99%

“…In the latter, case, the structure can be a disordered variant in which the R atoms also occupy the 2c sites and the iron atoms occupy the 4e sites. 25,[37][38][39][40][41][42] In addition, for R 2 Fe 17 alloys, the rare-earth magnetic anisotropy is rather weak and the contributions of the rare-earth atoms are not sufficiently strong to counteract the iron sublattice anisotropy at room temperature, which favors an easy plane magnetization. Recently, the body of experimental data on R 2 Fe 17 has been enriched with results from a moderate MCE.…”

Section: Introductionmentioning

confidence: 99%

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Magnetovolume and magnetocaloric effects in Er2Fe17

et al. 2012

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Combining different experimental techniques, investigations in hexagonal P 6 3 /mmc Er 2 Fe 17 show remarkable magnetovolume anomalies below the Curie temperature, T C . The spontaneous magnetostriction reaches 1.6 × 10 −2 at 5 K and falls to zero well above T C , owing to short-range magnetic correlations. Moreover, Er 2 Fe 17 exhibits direct and inverse magnetocaloric effects (MCE) with moderate isothermal magnetic entropy S M , and adiabatic temperature T ad changes [ S M ∼ −4.7 J(kgK) −1 and T ad ∼ 2.5 K near the T C , and S M ∼ 1.3 J(kgK)and T ad ∼ −0.6 K at 40 K for H = 80 kOe, respectively, determined from magnetization measurements].The existence of an inverse MCE seems to be related to a crystalline electric field-level crossover in the Er sublattice and the ferrimagnetic arrangement between the magnetic moments of the Er and Fe sublattice. The main trends found experimentally for the temperature dependence of S M and T ad as well as for the atomic magnetic moments are qualitatively well described considering a mean-field Hamiltonian that incorporates both crystalline electric field and exchange interactions. S M (T ) and T ad (T ) curves are essentially zero at ∼150 K, the temperature where the transition from direct to inverse MCE occurs. A possible interplay between the MCE and the magnetovolume anomalies is also discussed.

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Section: Crystal and Magnetic Structures Of Er 2 Fe 17mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetovolume and magnetocaloric effects in Er2Fe17

et al. 2012

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“…The distance in CueCu dumbbells observed for instance in YCu 6.576 is equal to 2.38 Å, a very short distance compared to the CueCu distance of 2.56 Å in the metallic copper [16]. In "Th 2 Ni 17 " or "Ho 2 Fe 17 " compounds, nickel or iron dumbbells are also observed around [17,18]. If H is hypothetically placed into the same position in La 2 Mg 17 , MgeH and LaeH distances of 2.15 and 2.99 Å would be observed.…”

Section: Crystal Structurementioning

confidence: 99%

Rich magnesium ternary compound so-called LaCuMg8 derived from La2Mg17. Structure and hydrogenation behavior

2011

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“…For instance, the total suppression of the ferromagnetic phase under the hydrostatic pressure was observed [4,5]. On the other hand, hydrogenation of Lu 2 Fe 17 [6] leads to a total suppression of the antiferromagnetic phase resulting in the stabilization of ferromagnetism in the whole range of magnetically ordered state (hydrogenation can be understood in terms of applied negative pressure despite the additional electron donated from the hydrogen atom [7]). …”

Section: Introductionmentioning

confidence: 99%