The ternary Ce2Co17-based systems in which Co is replaced by Ti, V, Cr, Mn, Fe, Cu, Zr, and Hf have been studied to ascertain the effect of substitution on their magnetic and crystallographic properties. X-ray diffraction experiments indicate that Mn and Fe stabilize the rhombohedral Th2Zn17 structure, while Ti, V, Cr, Cu, Zr, and Hf stabilize the hexagonal Th2Ni17 structure. The unit cell volume is found to increase by introducing substituents for all the systems. The Curie temperatures TC decrease monotonically with increasing x, in the order Fe<Hf<Cu<Zr<Ti<Mn<Cr<V. The saturation magnetizations Ms increase with increasing x for the Fe system with x?10 and the Mn system with x<2. It is found that Ms decreases sharply with x in the Mn system with x?2 and in the other systems, the magnitude of the effect being in the order Hf≳V≳Cr≳Mn≳Zr≳Ti≳Cu. The rate of decrease is larger than that expected as a simple dilution except for the Cu system. The anisotropy field HA shows a maximum around x = 2 for the Cr, Mn, and Fe systems, indicating that T atoms substitute preferentially for the dumbbell cobalts in Ce2Co17−xTx with x?2. The magnitude of the effect of substitution on HA is found to be in the order Zr≳V≳Hf≳Ti≳Cr≳Mn≳Fe≳Cu in the range of x?1.0. Crystallographic and magnetic characteristics suggest that all substituents replace Co when the ternaries are formed.

10.1063/1.330861

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Citations (35)

Effect of interstitial hydrogen and nitrogen on magnetic and structural properties of R2T17 (R ≡ Y, Ce and Sm; T ≡ Fe, Co and Ni)

Journal of Alloys and Compounds (1995)

H. Fujii M. Akayama K. Nakao K. Tatami

Magnetism

Formula unit

Saturation (graph theory)

10.1016/0925-8388(94)05007-4

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Citations (26)

Tonneling spectroscopy of the energy gap in the senneonducting phase of La_ Sr_xCuO_4

Meeting abstracts of the Physical Society of Japan (2001)

Toshikazu Ekino Satoru Hashimoto Tomoaki Takasaki J. Hori Fumihiko Nakamura

Source

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Heat capacity of inter metallic compound CeMg2Cu9

Meeting abstracts of the Physical Society of Japan (2002)

Michiko Ito K. Asada Yoshiteru Nakamori H. Fujii Toyohisa Fujita

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Magnetic properties of LaMn2Ge2 single crystal

Journal of Magnetism and Magnetic Materials (1985)

T. Shigeoka N. Iwata H. Fujii T. Okamoto

Crystal (programming language)

10.1016/0304-8853(85)90133-7

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Citations (36)

Magnetism in rare earth Co2 compounds under high pressures

Journal of Applied Physics (2001)

O. Syshchenko V. Sechovský M. Diviš T. Fujita Robert G. Hauser

We have studied electrical resistivity anomalies connected with magnetism in RECo2 (RE=Nd, Tb, Er, Ho) compounds in pressures up to 8 GPa. At ambient pressure the former two compounds exhibit a second order magnetic phase transition (SOMPT) at TC, whereas a first order magnetic phase transition (FOMPT) is observed in the latter two. Although TC decreases with pressure in all four compounds, the TC(P) dependence for NdCo2 and TbCo2 differs considerably from this for HoCo2 and ErCo2. For the latter two, Tc vs P data deviate dramatically from the initial linear dependence above a critical pressure Pc to become almost pressure independent at higher pressures. We propose that this is reflecting the loss of Co metamagnetism that is also indicated by the vanishing resistivity drop at Tc for P>4 GPa and by the change from a FOMPT to a SOMPT. A scenario is discussed assuming that for P>Pc the projected Co 3d density of states at EF decreases. Hence the Co moment collapses because the RE-Co-RE exchange channel becomes ineffective to induce the itinerant 3d electron metamagnetism. The localized RE moments, however, order at a “residual” TC due to the persisting Ruderman–Kittel–Kasuya–Yosida-type exchange interaction. For NdCo2 and TbCo2 the Tc values decrease with pressure by an exponential law but remain rather high in the highest applied pressures. Results of first-principles electronic structure calculations using the full-potential linearized augmented plane wave method are presented for HoCo2 and NdCo2 compounds, as well.

Metamagnetism

Magnetism

Ambient pressure

10.1063/1.1359459

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Citations (7)

Synthesis of quinolinomorphinan-4-ol derivatives as δ opioid receptor agonists

Bioorganic & Medicinal Chemistry (2011)

Yoshihiro Ida Toru Nemoto Shigeto Hirayama H. Fujii Yumiko Osa

10.1016/j.bmc.2011.11.047

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Citations (29)

CCDC 1484443: Experimental Crystal Structure Determination

The Cambridge Structural Database (2019)

Kennosuke Itoh Fumiya Odate Takuma Karikomi Keishi Obe Tsutomu Miyamori

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/ccdc.csd.cc1ltp8c

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ChemInform Abstract: Efficient Synthesis of Chiral Propargyl Alcohols by Enantioselective Titanium‐TADDOLate Catalyzed Addition of Dimethylzinc to 3‐ Trimethylsilyl‐2‐propynal.

ChemInform (1996)

Nobuki Oguni Nobuyuki Satoh H. Fujii

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Propargyl

Dimethylzinc

Trimethylsilyl

10.1002/chin.199611042

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