Growth of bulk single-crystal MnP helimagnet and its structural and NMR characterization

JOURNAL OF ALLOYS AND COMPOUNDS

卷:725

Article

Zhigadlo, Nikolai D.¹  Barbero, Nicolo²  Shiroka, Toni^2,3 

[1] Univ Bern, Dept Chem & Biochem, Freiestr 3, CH-3012 Bern, Switzerland

[2] Swiss Fed Inst Technol, Solid State Phys Lab, Otto Stern Weg 1, CH-8093 Zurich, Switzerland

[3] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

关键词: Manganese phosphide;    Magnetic materials;    High-pressure synthesis;    Single crystal growth;    Crystal structure;    X-ray diffraction;    P-31 NMR;   

DOI  :  10.1016/j.jallcom.2017.07.247

来源: Elsevier

【 摘 要 】

Bulk single crystals of manganese phosphide (MnP) were grown from melt at 1 GPa and 1200 degrees C by using a cubic-anvil, high-pressure, and high-temperature technique. The obtained black colored crystals exhibit a plate-like morphology, with flat surfaces and maximum dimensions up to similar to 4 x 2 x 0.5 mm(3). The orthorhombic crystal structure was confirmed by X-ray diffraction [Pnma, 62, Z 4, a = 5.2510(4) angstrom, b = 3.1670(3) angstrom, c = 5.9098 (4) angstrom and V = 98.279(14) angstrom(3)]. Temperature-dependent magnetization measurements reveal the occurrence of two successive transitions: a paramagnetic to ferromagnetic transition at T-c = 290.5 K and the development of a double helimagnetic order at T-s = 44.5 K. Zero-field P-31 NMR measurements in the FM and in the screw-spin AFM state show prominent features, which are compared with previous experimental data and theoretical calculations. The relatively large crystals obtained here open up new possibilities for further explorations of this interesting material. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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