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Ironing out the transition metal contribution to the magnetism of the n = 3 members of the homologous series Prn+1MnGe3n+1 (M = Fe, Co): Pr4Fe3Ge10 vs. Pr4Co3Ge10

Journal Article · · Journal of Alloys and Compounds
 [1];  [2];  [3];  [3];  [2];  [4];  [2]
  1. Baylor Univ., Waco, TX (United States); Baylor University
  2. Baylor Univ., Waco, TX (United States)
  3. Univ. of Idaho, Moscow, ID (United States)
  4. Florida State Univ., Tallahassee, FL (United States)

The Lnn+1MnX3n+1 (Ln = lanthanide, M = transition metal, and X = tetrel) homologous series provides a platform to study collective phenomena in quantum materials. Here, in this work, we compare the crystal growth, structure, and magnetic properties of the n = 3 members of the Prn+1MnGe3n+1 (M = Fe, Co) analogues, Pr4Fe3Ge10 (a = 4.3207 (10) Å, b = 35.523 (8) Å, c = 4.2982 (15) Å, and V = 659.7 (3) Å3) and Pr4Co3Ge10 (a = 4.3091 (12) Å, b = 35.750 (9) Å, c = 4.2807 (11) Å, and V = 659.4 (3) Å3). We determined that the ideal flux growth conditions for each compound are highly dependent on the concentration of Sn flux and quench temperature. Pr4Fe3Ge10 orders ferromagnetically at 10 K along the c-direction while Pr4Co3Ge10 orders antiferromagnetically at 16 K along the b-direction. For both compounds, we observed a magnetic moment higher than that expected for only Pr3+ ions (3.58 µB/Pr), implying that the transition metal ions contribute to magnetic ordering (3.91, 3.48, and 3.69 µB/Pr for Pr4Fe3Ge10, and 3.76, 4.04, and 3.83 µB/Pr for Pr4Co3Ge10 measured along the a-, b-, and c-directions, respectively). Moreover, the zero-field Mössbauer spectrum obtained at 4.2 K for Pr4Fe3Ge10 demonstrates that the iron sites participate in magnetic ordering.

Research Organization:
Baylor Univ., Waco, TX (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Contributing Organization:
National High Magnetic Field Laboratory
Grant/Contract Number:
SC0022068
OSTI ID:
2339449
Journal Information:
Journal of Alloys and Compounds, Journal Name: Journal of Alloys and Compounds Vol. 976; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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