Magnetic properties and magnetocaloric effect in NdCo2B2 compound

被引：33

作者：

Li, Lingwei ^{[1
]}

Nishimura, Katsuhiko ^{[1
]}

机构：

[1] Toyama Univ, Grad Sch Sci & Engn, Toyama 9308555, Japan

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2009年 / 42卷 / 14期

关键词：

STRUCTURAL CHEMISTRY; TEMPERATURE; MAGNETORESISTANCE; HEAT; LA; GD; SM; ER;

D O I：

10.1088/0022-3727/42/14/145003

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The magnetic properties and magnetocaloric effect (MCE) of NdCo2B2 were investigated by magnetization and heat capacity measurements. The compound exhibits a paramagnetic to ferromagnetic transition at T-C = 27 K. The effective magnetic moment is 3.53 mu(B)/Nd atom, and the magnetic ground state of Nd ion forms a doublet state in NdCo2B2. A large reversible MCE was observed, which is related to a second-order magnetic transition from the paramagnetic to the ferromagnetic state. The values of maximum magnetic entropy change (-Delta S-M(max)) reach 4.5 and 8.3 J kg(-1) K-1 for field changes of 20 and 70 kOe without obvious hysteresis loss in the vicinity of the Curie temperature, respectively. The corresponding maximum adiabatic temperature changes (Delta T-ad(max)) are evaluated to be 3.3 and 6.9 K.

引用

页数：5

共 32 条

[1] Anomalously high entropy change in FeRh alloy
Annaorazov, MP
Nikitin, SA
Tyurin, AL
Asatryan, KA
Dovletov, AK
[J]. JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) : 1689 - 1695
[2] SPECIFIC-HEAT IN SOME GADOLINIUM COMPOUNDS .1. EXPERIMENTAL
BOUVIER, M
LETHUILLIER, P
SCHMITT, D
[J]. PHYSICAL REVIEW B, 1991, 43 (16) : 13137 - 13144
[3] Developments in magnetocaloric refrigeration
Brück, E
[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (23) : R381 - R391
[4] Magnetocaloric effect in rare-earth pseudobinary Er(Co1-cNic)2 -: art. no. 064421
de Oliveira, NA
von Ranke, PJ
Troper, A
[J]. PHYSICAL REVIEW B, 2004, 69 (06)
[5] Magnetic order in RMn2Ge2 (R=Y,Ca) compounds and their solid solutions with LaMn2Ge2
Di Napoli, S.
Llois, A. M.
Bihlmayer, G.
Bluegel, S.
[J]. PHYSICAL REVIEW B, 2007, 75 (10):
[6] Metamagnetism, giant magnetoresistance and magnetocaloric effects in RCO2-based compounds in the vicinity of the Curie temperature
Duc, NH
Anh, DTK
Brommer, PE
[J]. PHYSICA B-CONDENSED MATTER, 2002, 319 (1-4) : 1 - 8
[7] MAGNETIC-PROPERTIES AND HYPERFINE INTERACTIONS IN NDCO2B2,GDCO2B2,TBCO2B2
FELNER, I
[J]. SOLID STATE COMMUNICATIONS, 1984, 52 (02) : 191 - 195
[8] Itinerant-electron metamagnetic transition and large magnetocaloric effects in La(FexSi1-x)13 compounds and their hydrides -: art. no. 104416
Fujita, A
Fujieda, S
Hasegawa, Y
Fukamichi, K
[J]. PHYSICAL REVIEW B, 2003, 67 (10)
[9] Physical properties of RCo2 Laves phases
Gratz, E
Markosyan, AS
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (23) : R385 - R413
[10] Recent developments in magnetocaloric materials
Gschneidner, KA
Pecharsky, VK
Tsokol, AO
[J]. REPORTS ON PROGRESS IN PHYSICS, 2005, 68 (06) : 1479 - 1539

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