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Titolo:
Negative thermal expansion and magnetic properties of Y2Al3Fe14-xMnx compounds
Autore:
Hao, YM; Gao, Y; Wang, BW; Qu, JP; Li, YX; Hu, JF; Deng, JC;
Indirizzi:
Hebei Univ Technol, Ctr Magnet Mat & Magnet Technol, Tianjin 300130, Peoples R China Hebei Univ Technol Tianjin Peoples R China 300130 00130, Peoples R China Shandong Univ, Dept Phys, Jinan 250100, Peoples R China Shandong Univ Jinan Peoples R China 250100 Jinan 250100, Peoples R China Tianjin Normal Univ, Dept Phys, Tianjin 300071, Peoples R China Tianjin Normal Univ Tianjin Peoples R China 300071 0071, Peoples R China
Titolo Testata:
APPLIED PHYSICS LETTERS
fascicolo: 21, volume: 78, anno: 2001,
pagine: 3277 - 3279
SICI:
0003-6951(20010521)78:21<3277:NTEAMP>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIFFRACTION; ZRW2O8; PHASE; ORDER; MN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
15
Recensione:
Indirizzi per estratti:
Indirizzo: Hao, YM Hebei Univ Technol, Ctr Magnet Mat & Magnet Technol, Tianjin 300130, Peoples R China Hebei Univ Technol Tianjin Peoples R China 300130 eoples R China
Citazione:
Y.M. Hao et al., "Negative thermal expansion and magnetic properties of Y2Al3Fe14-xMnx compounds", APPL PHYS L, 78(21), 2001, pp. 3277-3279

Abstract

The structure and magnetic properties of Y2Al3Fe14-xMnx (x=0-12) compoundshave been investigated by means of x-ray diffraction and magnetization measurements. The Y2Al3Fe14-xMnx compounds have a hexagonal Th2Ni17-type structure. Their unit-cell volumes increase slowly with increasing x first, thenincreases rapidly with the further increase of x. This implies that there exists a positive spontaneous volume magnetostriction in the magnetic stateof Y2Al3Fe14-xMnx compounds. X-ray diffraction of the Y2Al3Fe11Mn3 compound from 150 to 300 K shows that there appears a negative coefficient of thermal expansion, <(<alpha>)over bar>approximate to -7.5x10(-5)/K, from 185 to200 K. The Curie temperature and the saturation magnetization of these compounds show a rapid drop with increasing x. (C) 2001 American Institute of Physics.

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Documento generato il 04/12/20 alle ore 22:44:00