Neutron diffraction studies of the magnetoelastic compoundsTb5SixGe4−x(x | Zendy

V. Ovidiu Garlea | Zendy; J. L. Zarestky | Zendy; C. Jones | Zendy; Lihua Lin | Zendy; D. L. Schlagel | Zendy; T. A. Lograsso | Zendy; A. O. Tsokol | Zendy; V. K. Pecharsky | Zendy; K. A. Gschneidner | Zendy; C. Stassis | Zendy

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Neutron diffraction studies of the magnetoelastic compoundsTb5SixGe4−x(x

Author(s) -

V. Ovidiu Garlea,

J. L. Zarestky,

C. Jones,

Lihua Lin,

D. L. Schlagel,

T. A. Lograsso,

A. O. Tsokol,

V. K. Pecharsky,

K. A. Gschneidner,

C. Stassis

Publication year - 2005

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.72.104431

Subject(s) - antiferromagnetism , orthorhombic crystal system , neutron diffraction , monoclinic crystal system , ferromagnetism , condensed matter physics , crystallography , magnetic moment , paramagnetism , materials science , physics , magnetic structure , crystallite , magnetization , crystal structure , chemistry , magnetic field , quantum mechanics

We report the results of a neutron diffraction study, carried out on both single crystalline and polycrystalline samples of Tb{sub 5}Si{sub 2.2}Ge{sub 1.8} and polycrystalline Tb{sub 5}Si{sub 2.5}Ge{sub 1.5}. On cooling, at approximately 120 K, the Tb{sub 5}Si{sub 2.2}Ge{sub 1.8} system undergoes a magnetoelastic transition from a high-temperature monoclinic-paramagnetic to a low-temperature orthorhombic-ferromagnetic structure. Between 120 K and 75 K, the magnetic structure has a net ferromagnetic component along the a axis direction. The moments are slightly canted with respect to the a axis, while the components along the b and c axes are ordered antiferromagnetically. A second magnetic transition occurs at approximately 75 K. Below this temperature, the magnetic structure consists of ferromagnetically aligned {mu}{sub x} and {mu}{sub z} projections of the magnetic moments and an antiferromagnetic arrangement of the {mu}{sub y} moment components. Magnetic structures of Tb{sub 5}Si{sub 2.5}Ge{sub 1.5} are nearly identical to those of Tb{sub 5}Si{sub 2.2}Ge{sub 1.8}.

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