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Competing magnetic interactions in the intermetallic compounds Pr5Ge3 and Nd5Ge3
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10.1063/1.3556920
/content/aip/journal/jap/109/7/10.1063/1.3556920
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3556920

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Magnetization vs temperature of Pr5Ge3 in the applied field of 0.5 T.

Image of FIG. 2.
FIG. 2.

(Color online) Magnetization vs temperature of Pr5Ge3 in the applied field of 10 mT in zero-field-cooled and field-cooled states (Inset: Magnetization vs field at 5 K in the fields up to 9 T).

Image of FIG. 3.
FIG. 3.

(Color online) (a) Magnetization vs field isotherms of Pr5Ge3 in the applied fields of 7 in the temperature range of 5–50 K T and (b) magnetic entropy change near the magnetic transition.

Image of FIG. 4.
FIG. 4.

Neutron diffraction patterns of Nd5Ge3 at (a) 297 K and (b) 2 K. The upper vertical bars indicate crystal-lattice Bragg angles; the lower vertical bars indicate magnetic reflection angles with K = [0, 0, ±1/5] wave vector; the lower profile gives the difference between observed and calculated data in terms of flat spiral with K = [0, 0, ±1/5] (see Table I).

Image of FIG. 5.
FIG. 5.

(Color online) Magnetic ordering temperature vs de Gennes factor (G) ratio for Mn5Si3-type R5Ge3 compounds. The phases with the known magnetic structure are listed in the figure. 1. Nd5Ge3: Flat spiral (K = [0, 0, ±1/5]) [this work]; II. Er5Ge3: Sine modulated AF (K = [0, 0, ±3/10]);6 III. Ho5Ge3-HT: Sine modulated AF (K = [0, 0, ±3/10]) and square modulated AF (K = [0, 1/2, 0] components; IV. Ho5Ge3-LT: Sine modulated components with K = [0, 0, ±3/10]), K = [0, 0, ±2/5] and K = [±1/5, ±1/5, 0] and square modulated component with K = [0, 1/2, 0];7 and V. Tb5Ge3: Flat spiral (K = [0, 0, ±0.475,1/2].4,5

Tables

Generic image for table
Table I.

Crystallographic and magnetic parameters of Nd5Ge3 compound: Cell parameters, a and c, atomic position parameters, XNd1 and XGe at temperature T, and magnetic moment of the Nd atom in the 6g site MNd1 and 4d site MNd2. Reliability factors RF (crystal structure) and RF m (magnetic structure) are given in percentage (%). The flat spiral axis coincides with cell parameter, a. Wave vector is K = [0, 0, ±1/5].

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/content/aip/journal/jap/109/7/10.1063/1.3556920
2011-03-30
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Competing magnetic interactions in the intermetallic compounds Pr5Ge3 and Nd5Ge3
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3556920
10.1063/1.3556920
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