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Magnetism of Nd3+ ions in Nd5Rh4Sn10

Title
Magnetism of Nd3+ ions in Nd5Rh4Sn10
Authors
Ramakrishnan, SPatil, NGKang, WHa, HIKim, YSTakeuchi, TMiyako, YMenovsky, AANieuwenhuys, GJMydosh, JA
Ewha Authors
강원
SCOPUS Author ID
강원scopus
Issue Date
2001
Journal Title
PHYSICAL REVIEW B
ISSN
1098-0121JCR Link1550-235XJCR Link
Citation
vol. 63, no. 18
Publisher
AMER PHYSICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS scopus
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.
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자연과학대학 > 물리학전공 > Journal papers
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