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From Tb3Ni2 to Tb3CoNi : The interplay between chemistry, structure, and magnetism

Journal Article · · Physical Review Materials
 [1];  [2];  [3];  [4];  [5];  [2]
  1. Institut Laue-Langevin, Grenoble (France)
  2. University of Genova (Italy); Ames Lab. and Iowa State Univ., Ames, IA (United States); Institute SPIN-CNR, Genova (Italy)
  3. CELLS-ALBA Synchrotron, Barcelona (Spain)
  4. Tata Institute of Fundamental Research, Mumbai (India)
  5. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Formation, crystal structure, and macroscopic and microscopic magnetism of the binary Tb3Ni2 and derivative pseudobinary Tb3CoxNi2-x phases have been investigated using an array of experimental methods. While Tb3Ni2 crystallizes in the monoclinic Dy3Ni2 structure type (mS20, C2/m), the substitution of Co for Ni results in a structural transition into the rhombohedral Er3Ni2 type (hR45, R$$\overline{3}$$h) at x(Co) ≈ 0.34 and beyond in the Tb3CoxNi2-x system. In both the monoclinic and rhombohedral phases, the addition of Co leads to an anisotropic change of lattice parameters and unexpected reduction of the cell volume. Measurements of bulk properties reveal that these compounds order ferrimagnetically or ferromagnetically at about 100 K. Complex noncollinear ferromagnetic ordering in the Tb sublattices is weakly dependent on composition. Lastly, for x > 0.34 the long-range magnetic ordering leads to a strong anisotropic magnetostriction accompanied by a symmetry reduction from rhombohedral to triclinic.
Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-07CH11358
OSTI ID:
1498681
Alternate ID(s):
OSTI ID: 1495238
Report Number(s):
IS-J--9900
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 2 Vol. 3; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde), Vol. 103, Issue 10 https://doi.org/10.3139/146.110756
journal January 2012

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