Ferromagnetic-to-Paramagnetic Phase Transition of MnAs Studied by Calorimetry and Magnetic Measurements


如何引用文章

全文:

开放存取 开放存取
受限制的访问 ##reader.subscriptionAccessGranted##
受限制的访问 订阅存取

详细

Manganese monoarsenide samples have been prepared by the sealed-ampule technique and characterized by X-ray diffraction, differential thermal analysis, and scanning electron microscopy. The hexagonal- to-orthorhombic phase transition of MnAs has been studied using differential scanning calorimetry (DSC) and magnetic measurements. The enthalpy and temperature range of the transition have been determined to be ΔH =–5.6 J/g and 312.5–319 K, respectively. The enthalpy and temperature range of the transition are influenced by the quality of the samples. The samples containing inclusions of the metastable, orthorhombic phase have a lower enthalpy and broader temperature range of the magnetostructural transformation of manganese monoarsenide. It has been demonstrated that DSC is an effective tool for assessing the quality of MnAs samples. Temperature dependences of specific magnetization and magnetic permeability for MnAs lend support to the DSC results. From these data, the Curie temperature of MnAs has been determined to be 40°C, in good agreement with previously reported data.

作者简介

S. Marenkin

Kurnakov Institute of General and Inorganic Chemistry; Moscow Institute of Steel and Alloys (National University of Science and Technology)

编辑信件的主要联系方式.
Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 31, Moscow, 119991; Leninskii pr. 4, Moscow, 119991

A. Aronov

Kurnakov Institute of General and Inorganic Chemistry

Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 31, Moscow, 119991

I. Fedorchenko

Kurnakov Institute of General and Inorganic Chemistry

Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 31, Moscow, 119991

A. Zheludkevich

Scientific–Practical Materials Research Centre (State Research and Production Association)

Email: marenkin@rambler.ru
白俄罗斯, ul. Brovki 19, Minsk, 220072

A. Khoroshilov

Kurnakov Institute of General and Inorganic Chemistry

Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 31, Moscow, 119991

M. Vasil’ev

Kurnakov Institute of General and Inorganic Chemistry

Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 31, Moscow, 119991

V. Kozlov

Topchiev Institute of Petrochemical Synthesis

Email: marenkin@rambler.ru
俄罗斯联邦, Leninskii pr. 29, Moscow, 119991

补充文件

附件文件
动作
1. JATS XML

版权所有 © Pleiades Publishing, Ltd., 2018