57Fe Mossbauer and x-ray magnetic circular dichroism study of magnetic compensation of the rare-earth sublattice in Nd2-xHoxFe14B compounds

被引：15

作者：

Chaboy, J. ^{[1
]}

Piquer, C. ^{[1
]}

Plugaru, N. ^{[1
]}

Bartolome, F. ^{[1
]}

Laguna-Marco, M. A. ^{[2
]}

Plazaola, F. ^{[3
]}

机构：

[1] Univ Zaragoza, CSIC, Inst Ciencia Mat, E-50009 Zaragoza, Spain

[2] Univ Cantabria, CITIMAC, E-39005 Santander, Spain

[3] Univ Basque Country, Dept Elect & Electron, E-48080 Bilbao, Spain

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 13期

关键词：

D O I：

10.1103/PhysRevB.76.134408

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present here a study of the magnetic properties of the Nd2-xHoxFe14B series. The macroscopic properties of these compounds evolve continuously from those of Nd2Fe14B to those of Ho2Fe14B as Ho gradually replaces Nd. The system shows a compensation of the rare-earth sublattice magnetization for a critical concentration, x(c)=0.55, that is reflected into the anomalous behavior of both macroscopic and microscopic magnetic probes. The combined analysis of magnetization, Fe-57 Mossbauer spectroscopy and Fe K-edge x-ray magnetic circular dichroism (XMCD) measurements suggests that the origin of the anomalous magnetic behavior found at x(c)=0.55 is mainly due to the Ho sublattice. Moreover, the analysis of the Fe K-edge XMCD signals reveal the presence of a rare-earth contribution, reflecting the coupling of the rare-earth and Fe magnetic moments, which can lead to the possibility of disentangling the magnetic behavior of both Fe and R atoms using a single absorption edge.

引用

页数：12

共 35 条

[1] Strong noncollinearity between nonequivalent Nd magnetic moments in Nd2Fe14B at low temperature [J].

Bartolomé, F ;

Tonnerre, JM ;

Jaouen, N ;

Raoux, D ;

Chaboy, J ;

García, LM ;

Maruyama, H ;

Steinmann, R .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :4762-4764

[2] Permanent magnets based on R-Fe-B and R-Fe-C alloys [J].

Burzo, E .

REPORTS ON PROGRESS IN PHYSICS, 1998, 61 (09) :1099-1266

[3] X-RAY CIRCULAR-DICHROISM AND LOCAL MAGNETIC-FIELDS [J].

CARRA, P ;

THOLE, BT ;

ALTARELLI, M ;

WANG, XD .

PHYSICAL REVIEW LETTERS, 1993, 70 (05) :694-697

[4] Modification of the rare-earth magnetic moment upon hydrogen absorption in R-Fe intermetallics probed by Fe K-edge x-ray magnetic circular dichroism [J].

Chaboy, J ;

Garcia, LM ;

Bartolome, F ;

Maruyama, H ;

Marcelli, A ;

Bozukov, L .

PHYSICAL REVIEW B, 1998, 57 (21) :13386-13389

[5] X-ray magnetic circular dichroism at the iron K edge in rare-earth-transition-metal intermetallics: Experimental probe of the rare-earth magnetic moment [J].

Chaboy, J ;

Maruyama, H ;

Garcia, LM ;

Bartolome, J ;

Kobayashi, K ;

Kawamura, N ;

Marcelli, A ;

Bozukov, L .

PHYSICAL REVIEW B, 1996, 54 (22) :15637-15640

[6] Rare-earth orbital contribution to the FeK-edge x-ray magnetic circular dichroism in rare-earth transition-metal intermetallic compounds -: art. no. 134421 [J].

Chaboy, J ;

Laguna-Marco, MA ;

Sánchez, MC ;

Maruyama, H ;

Kawamura, N ;

Suzuki, M .

PHYSICAL REVIEW B, 2004, 69 (13) :134421-1

[7] Relationship between hydriding and Nd magnetic moment in Nd2Fe14B [J].

Chaboy, J ;

Piquer, C ;

Plugaru, N ;

Artigas, M ;

Maruyama, H ;

Kawamura, N ;

Suzuki, M .

JOURNAL OF APPLIED PHYSICS, 2003, 93 (01) :475-478

[8] Evidence of quadrupolar transitions in the circular dichroism at the neodymium L2 and L3 edges [J].

Chaboy, J ;

Bartolome, F ;

Garcia, LM ;

Cibin, G .

PHYSICAL REVIEW B, 1998, 57 (10) :R5598-R5601

[9] X-ray magnetic-circular-dichroism probe of a noncollinear magnetic arrangement below the spin reorientation transition in Nd2Fe14B [J].

Chaboy, J ;

Garcia, LM ;

Bartolome, F ;

Marcelli, A ;

Cibin, G ;

Maruyama, H ;

Pizzini, S ;

Rogalev, A ;

Goedkoop, JB ;

Goulon, J .

PHYSICAL REVIEW B, 1998, 57 (14) :8424-8429

[10] A MOSSBAUER-EFFECT STUDY OF THE RE2FE14B MAGNETS, WHERE RE IS Y, PR, ND, AND GD [J].

GRANDJEAN, F ;

LONG, GJ ;

PRINGLE, OA ;

FU, J .

HYPERFINE INTERACTIONS, 1990, 62 (1-2) :131-146

← 1 2 3 4 →