Artículos de revistas
Magnetic Structure Of Sm2 Ir In8 Determined By X-ray Resonant Magnetic Scattering
Registro en:
Physical Review B - Condensed Matter And Materials Physics. , v. 76, n. 10, p. - , 2007.
10980121
10.1103/PhysRevB.76.104515
2-s2.0-34748832173
Autor
Adriano C.
Lora-Serrano R.
Giles C.
De Bergevin F.
Lang J.C.
Srajer G.
Mazzoli C.
Paolasini L.
Pagliuso P.G.
Institución
Resumen
The magnetic structure of the intermetallic antiferromagnet Sm2 Ir In8 was determined using x-ray resonant magnetic scattering. Below TN =14.2 K, Sm2 Ir In8 has a commensurate antiferromagnetic structure with a propagation vector η = (12,0,0). The Sm magnetic moments lie in the ab plane and are rotated roughly 18° away from the a axis. The magnetic structure of this compound was obtained by measuring the strong dipolar resonant peak whose enhancement was of over 2 orders of magnitude at the L2 edge. At the L3 edge, both quadrupolar and dipolar features were observed in the energy line shape. The magnetic structure and properties of Sm2 Ir In8 are found to be consistent with the general trend already seen for the Nd-, Tb-, and the Ce-based compounds from the Rm Mn In3m+2n family (R=rare earth; M=Rh or Ir; m=1,2; n=0,1), where the crystalline electrical field effects determine the direction of magnetic moments and the TN evolution in the series. The measured Néel temperature for Sm2 Ir In8 is slightly suppressed when compared to the TN of the parent cubic compound Sm In3. © 2007 The American Physical Society. 76 10
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