Magnetic properties of HoFe6Al6H hydride: A single-crystal study
p. 152-157
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2017
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oai:112.137.131.14:VNU_123-581822017-09-30T20:31:11Z Magnetic properties of HoFe6Al6H hydride: A single-crystal study A.V. Andreev I.A. Pelevin J. Sebek a E.A. Tereshina D.I. Gorbunov H. Drulis I.S. Tereshina Rare-earth intermetallics Hydrides Ferrimagnetism Magnetic anisotropy High magneticfields Field-induced transition p. 152-157 Crystal structure and magnetic properties were studied on a single crystal of HoFe6Al6H and compared with those of the parent HoFe6Al6compound with a tetragonal crystal structure of the ThMn12 type. Hydrogenation leads to a 1% volume expansion. HoFe6Al6is a ferrimagnet with exact compensation of the Ho and Fe sublattices magnetizations at low temperatures. Both the hydride and the parent com-pound display a high magnetic anisotropy of the easy-plane type, a noticeable anisotropy exists also within the easy plane with the [110] axis as the easy magnetization direction. The hydrogenation in-creases slightly (from 10 to 10.45mB) the magnetic moment of the Fe sublattice as a result of volume expansion. It leads to a decompensation of the Fe and Ho sublattices and HoFe6Al6H has a spontaneous moment 0.45mB/f.u. The enhancement of the FeeFe intra-sublattice exchange interaction results in a higher Curie temperature (TC) value, 350 K in the hydride as compared to 315 K of HoFe6Al6. The HoeFe inter-sublattice interaction is also enhanced in the hydride. The molecular field H mol created on Ho ions by Fe sublattice is 38 T in HoFe6Al6and 48 T in HoFe6Al6H. The inter-sublattice exchange constantnHoFeis 3.8 T/mBand 4.6 T/mB, respectively. High-field measurements confirm the enhancement of the HoeFe exchange interaction in the hydride found from the temperature dependence of magnetization 2017-08-24T03:23:30Z 2017-08-24T03:23:30Z 2016 Article 2468-2284 http://repository.vnu.edu.vn/handle/VNU_123/58182 en application/pdf ĐHQGHN |
| institution |
Vietnam National University, Hanoi |
| building |
VNU Library & Information Center |
| country |
Vietnam |
| collection |
VNU Digital Repository |
| language |
English |
| topic |
Rare-earth intermetallics Hydrides Ferrimagnetism Magnetic anisotropy High magneticfields Field-induced transition |
| spellingShingle |
Rare-earth intermetallics Hydrides Ferrimagnetism Magnetic anisotropy High magneticfields Field-induced transition A.V. Andreev I.A. Pelevin J. Sebek a E.A. Tereshina D.I. Gorbunov H. Drulis I.S. Tereshina Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| description |
p. 152-157 |
| format |
Article |
| author |
A.V. Andreev I.A. Pelevin J. Sebek a E.A. Tereshina D.I. Gorbunov H. Drulis I.S. Tereshina |
| author_facet |
A.V. Andreev I.A. Pelevin J. Sebek a E.A. Tereshina D.I. Gorbunov H. Drulis I.S. Tereshina |
| author_sort |
A.V. Andreev |
| title |
Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| title_short |
Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| title_full |
Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| title_fullStr |
Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| title_full_unstemmed |
Magnetic properties of HoFe6Al6H hydride: A single-crystal study |
| title_sort |
magnetic properties of hofe6al6h hydride: a single-crystal study |
| publisher |
ĐHQGHN |
| publishDate |
2017 |
| url |
http://repository.vnu.edu.vn/handle/VNU_123/58182 |
| _version_ |
1680962996025688064 |