Structural, magnetic and magnetocaloric properties of HoNi2 and ErNi2 compounds ordered at low temperatures

被引：39

作者：

Cwik, J. ^{[1
,2
,3
]}

Koshkid'ko, Y. ^{[1
,2
,3
]}

Nenkov, K. ^{[4
]}

Tereshina, E. A. ^{[5
]}

Rogacki, K. ^{[1
,2
,3
]}

机构：

[1] PAS, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[2] PAS, Int Lab High Magnet Fields & Low Temp, PL-53421 Wroclaw, Poland

[3] PAS, Ctr Adv Mat & Smart Struct, PL-50950 Wroclaw, Poland

[4] IFW Dresden, Inst Metall Mat, D-01171 Dresden, Germany

[5] CAS, Inst Phys, Prague 18221, Czech Republic

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 735卷

关键词：

Magnetocaloric effect; Laves phase; Adiabatic temperature change; The second-order phase transitions; Magnetic properties; INTERMETALLIC COMPOUNDS; TRANSITIONS; LA;

D O I：

10.1016/j.jallcom.2017.11.194

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work we report on the structural, magnetic and magnetocaloric properties of polycrystalline HoNi2 and ErNi2 Laves-phase compounds. Powder X-ray diffraction studies at room temperature show that the compounds crystallize in the cubic C15 structure (MgCu2 type). The magnetic measurements reveal that the second-order magnetic phase transition from ferromagnetic to paramagnetic state appears at TC equal 13.5 K for HoNi2 and 6.5 K for ErNi2. Using direct measurements over a wide field range (up to 11 T), along with indirect methods, we have found low and high field regularities of the magnetocaloric effect characterized by the adiabatic temperature change, DTad, and the isothermal magnetic entropy change, DSmag. The magnetocaloric properties near the phase transition are discussed in the framework of the Landau theory for the second-order phase transitions. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1088 / 1095

页数：8

共 38 条

[1]

Belov K.P., 1961, Magnetic Transitions

[2]

Buschow K H J., 2003, Physics of Magnetism and Magnetic Materials

[3] The effect of substitution of La for Tb on some physical properties of Tb1-xLaxNi2 solid solutions [J].

Cwik, J. ;

Palewski, T. ;

Nenkov, K. ;

Burkhanov, G. S. ;

Chistyakov, O. D. ;

Klamut, J. ;

Warchulska, J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 460 (1-2) :41-46

[4] Magnetocaloric effect in Laves-phase rare-earth compounds with the second-order magnetic phase transition: Estimation of the high-field properties [J].

Cwik, J. ;

Koshkid'ko, Y. ;

de Oliveira, N. A. ;

Nenkov, K. ;

Hackemer, A. ;

Dilmieva, E. ;

Kolchugina, N. ;

Nikitin, S. ;

Rogacki, K. .

ACTA MATERIALIA, 2017, 133 :230-239

[5] Magnetic properties and transformation of crystal structure in the ErFe2-ErAl2 system [J].

Cwik, J. ;

Koshkid'ko, Y. ;

Mikhailova, A. ;

Kolchugina, N. ;

Nenkov, K. ;

Hackamer, A. ;

Miller, M. .

JOURNAL OF APPLIED PHYSICS, 2015, 117 (12)

[6] Experimental study of the magnetocaloric effect in Dy1-xErxCo2 solid solutions doped with Gd [J].

Cwik, J. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2013, 580 :341-347

[7] Magnetic properties and specific heat of Dy1-xLaxNi2 compounds [J].

Cwik, J. ;

Palewski, T. ;

Nenkov, K. ;

Lyubina, J. ;

Warchulska, J. ;

Klamut, J. ;

Gutfleisch, O. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2009, 321 (18) :2821-2826

[8] Magnetic phase transitions and the magnetothermal properties of gadolinium [J].

Dan'kov, SY ;

Tishin, AM ;

Pecharsky, VK ;

Gschneidner, KA .

PHYSICAL REVIEW B, 1998, 57 (06) :3478-3490

[9] Theoretical aspects of the magnetocaloric effect [J].

de Oliveira, N. A. ;

von Ranke, P. J. .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2010, 489 (4-5) :89-159

[10]

Foldeaki M, 1998, ADV CRYOG ENG, V43, P1533

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