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Volumn 46, Issue 7, 2007, Pages 2342-2344

MH2P2O7 (M = Co, Ni): Metamagnetic Interaction between the zigzag octahedral chains

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EID: 34247111831     PISSN: 00201669     EISSN: None     Source Type: Journal    
DOI: 10.1021/ic061665q     Document Type: Article
Times cited : (20)

References (32)
  • 27
    • 34247111799 scopus 로고    scopus 로고
    • Synthesis: 2 mmol of M(CH3COO)2·H 2O (M, Co, Ni) and 3 mL of concentrated H3PO4 (14.6 mol/L) were charged into a 50-mL Teflon reactor and heated at 220°C for 4 days. After cooling to room temperature, the solid products were isolated by washing with alcohol or cold water. CoH2P2O7 is not stable in hot water. The single crystals are purple for Co and green for Ni. The yield of the product is about 80% according to the transition metal. Other transition-metal resources such as divalent metal chlorides or nitrates are also effectual. Analyses: crystals of CoH2P2O 7 of about 0.2 x 0.2 x 0.3 mm3 were used for single-crystal data collection at 293 K on a Rigaku AFC6S diffractometer with graphite-monochromated Mo Kα radiation (λ, 0.710 73 Å) by the ω-2θ scan method. The structure was solved by using direct methods and r
    • 15 A total of 2005 reflections were measured in 2.32° < θ < 25.50°. Magnetic measurements were carried out on a superconducting quantum interference device magnetometer (SQUID, Quantum Design Co.) in the temperature range from 2 to 300 K under an applied field H of 1000 Oe. The magnetization curves were measured at 2 K up to H = 7 T. Chemical analysis was carried out using an inductively coupled plasma method on an ESCALAB2000 analyzer (Co:P = 1.0:2.1; Ni:P = 1.0:2.0). The thermal stability was analyzed with thermogravimetric analysis (TGA) on a Dupont 951 thermogravimetric analyzer in air with a heating rate of 10°C/min from 30 to 800°C. IR spectra (Nicolet Magna-IR-750 series II) confirm the presence of hydroxyl groups.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.