Magnetism of Nd3+ ions in Nd5Rh4Sn10

Ramakrishnan, S. ; Patil, N. G. ; Kang, W. ; Ha, Heon Ick ; Yaung-Soo, Kim ; Takeuchi, T. ; Miyako, Y. ; Menovsky, A. A. ; Nieuwenhuys, G. J. ; Mydosh, J. A. (2001) Magnetism of Nd3+ ions in Nd5Rh4Sn10 Physical Review B: Condensed Matter and Materials Physics, 63 (18). 184402_1-184402_7. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v63/i18/e184402

Related URL: http://dx.doi.org/10.1103/PhysRevB.63.184402

Abstract

In the family of rare-earth transition metal silicides, compounds belonging to the series R5Ir4Si10 (where R is a rare-earth element from Dy to Lu and Y) exhibits multiple phase transitions. However, there exists a series R5Rh4Sn10, which can only be formed with light rare-earth elements from Ce to Nd. In this work, we report detailed resistivity, susceptibility, magnetization, heat-capacity, thermal expansion, and magnetoresistance studies, which suggest that the Nd3+ moments undergo unusual magnetic orderings in a single crystal of Nd5Rh4Sn10. A second-order magnetic transition at 7.15 K is followed by a first-order transition below 6.15 K that results in a huge heat-capacity peak of 100 J/mol K. The two transitions are strongly suppressed by a magnetic field (4 T) along the c axis while they are only weakly influenced by fields as high as 16 T in the basal plane. Moreover, the magnetoresistance data along the a and c axes from 1.5 to 15 K in fields up to 18 T revealed a giant positive magnetoresistance along the a axis below 6 K and clear evidence of a metamagnetic transition along the c axis. We attribute this unusual magnetic behavior to the unique crystal structure of this Nd5Rh4Sn10 compound with its three different Nd sites.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:40834
Deposited On:25 May 2011 12:00
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