A structural analysis and some magnetic properties of the R2Fe17Hx series

High magnetic field study of the Tm2Fe17and Tm2FeIsnard1, Андреев2, Kuz’min3 et al. 2013Phys. Rev. BSelf Cite292170View full textAdd to dashboardCite

“…[7][8][9] Due to their large magnetization, R 2 Fe 17 with light rare earths were once considered potential candidates for permanent magnet applications. Indeed, some of their derivatives, such as Sm 2 Fe 17 N 3 or Sm 2 (Fe, Co, Zr) 17 , possess excellent permanent magnet properties. [10][11][12][13] Thus, R 2 Fe 17 are of interest from both technological and fundamental viewpoints.…”

“…An extensive study of the structural, magnetic, and Mössbauer spectroscopic properties of R 2 Fe 17 and R 2 Fe 17 H x was carried out by O. Isnard and coworkers. 11,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] One should also mention the work on pressure-induced noncollinear magnetic structures in Lu 2 (Ref. 34).…”

“…3,6 Interstitial insertion of hydrogen or deuterium leads to the formation of hydrides, Tm 2 Fe 17 H x , or deuterides, Tm 2 Fe 17 D x , with 1 < x < 3.2, accompanied by a simultaneous increase of the unit cell volume, magnetic ordering temperature, and the magnetic moment of iron, as well as a suppression of the helimagnetic and the easy-axis ferrimagnetic phases. 17,38 Tm 2 Fe 17 has not yet been studied in high magnetic fields, and it is not clear what kind of behavior one can expect of it, given that it is the only easy-axis ferrimagnet among the R 2 In the present paper, we have studied the magnetization of a single crystal of Tm 2 Fe 17 and aligned powder samples of Tm 2 Fe 17 D 3.2 in steady and pulsed magnetic fields (in one case as high as 74 T). The paper is organized as follows.…”

Dynamics of hydrogen in Pr2Fe17H4 and Pr2Fe17H5

“…The dramatic increase in Curie temperature and magnetization resulting from insertion of small atoms such as hydrogen into the host metal matrix of R 2 Fe 17 makes these materials attractive candidates for hard magnet materials [1][2][3]. Among them, one of the most promising compounds is Pr 2 Fe 17 H x [4][5][6][7].…”

“…The small size of the hexagons explains why the maximum hydrogen uptake in Pr 2 Fe 17 H x corresponds to x = 5, with onethird of the available t sites in the Pr 2 Fe 17 host structure filled. Isnard et al [3] proposed that a pair of hydrogen atoms occupies two diametrically opposed vertices of the hexagons in order to comply with Switendick's empirical criterion of ≈ 2.1 Å minimum H-H separation in ordered metal hydrides. Such a minimum has been ascribed to a repulsion interaction [10].…”