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The transition temperature Tc~26 K of the recently discovered superconductor LaFeAs(O,F) has been demonstrated to be extremely sensitive to the lanthanide ion, reaching 55 K for the Sm containing oxypnictides. Therefore, it is important to…

超导电性 · 物理学 2008-12-17 Y. Qiu , Wei Bao , Q. Huang , T. Yildirim , J. Simmons , J. W. Lynn , Y. C. Gasparovic , J. Li , M. Green , T. Wu , G. Wu , X. H. Chen

In this paper the magnetic behaviour of SmFeAsO and SmFeAs(O0.85F0.15) samples is presented and discussed. Molar susceptibility of SmFeAsO exhibits a local peak at T around 140K due to the establishment of a long range antiferromagnetic…

超导电性 · 物理学 2008-07-11 R. Cimberle , C. Ferdeghini , F. Canepa , M. Ferretti , A. Martinelli , A. Palenzona , A. S. Siri , M. Tropeano

The optical properties of Nd$_{0.7}$Sr$_{0.3}$MnO$_3$ thin films have been studied from 5 meV to 25 meV and from 0.25 eV to 3 eV, at temperatures from 15 K to 300 K and magnetic fields up to 8.9 T. A large transfer of spectral weight from…

凝聚态物理 · 物理学 2007-05-23 S. G. Kaplan , M. Quijada , H. D. Drew , D. B. Tanner , G. C. Xiong , R. Ramesh , C. Kwon , T. Venkatesan

Mn$_{3}$Sn is a non-collinear antiferromagnet which displays a large anomalous Hall effect at room temperature. It is believed that the principal contribution to its anomalous Hall conductivity comes from Berry curvature. Moreover, dc…

强关联电子 · 物理学 2019-07-24 Bing Cheng , Youcheng Wang , D. Barbalas , Tomoya Higo , S. Nakatsuji , N. P. Armitage

We report muon-spin rotation, heat capacity, magnetization, and ac magnetic susceptibility measurements of the layered spin-1/2 antiferromagnet NaNiO2. These show the onset of long-range magnetic order below T_N = 19.5K. Rapid muon…

强关联电子 · 物理学 2010-07-08 P. J. Baker , T. Lancaster , S. J. Blundell , M. L. Brooks , W. Hayes , D. Prabhakaran , F. L. Pratt

Unlike the widely studied ReFeAsO series, the newly discovered iron-based superconductor ThFeAsN exhibits a remarkably high critical temperature of 30 K, without chemical doping or external pressure. Here we investigate in detail its…

超导电性 · 物理学 2017-08-01 T. Shiroka , T. Shang , C. Wang , G. -H. Cao , I. Eremin , H. -R. Ott , J. Mesot

We report on the magnetic and electrical properties of a (Mn$_3$Sn)$_2$ triangular network kagome structured high quality Ho substituted ErMn$_6$Sn$_6$ single-crystal sample by magneto-transport measurements.…

The ferromagnetic (FM) nature of Nd2Fe14B has been investigated with muon spin rotation and relaxation ({\mu}^+SR) measurements on an aligned, sintered plate-shaped sample. A clear muon spin precession frequency (f_{FM}) corresponding to…

The discovery of reversible 300 K ferromagnetic ordering in a diluted magnetic semiconductor is reported. Switching of room-temperature ferromagnetism between "on" and "off" states is achieved in Co2+:ZnO by lattice incorporation and…

材料科学 · 物理学 2007-05-23 Dana A. Schwartz , Daniel R. Gamelin

The correlation between magnetic properties and microscopic structural aspects in the diluted magnetic semiconductor Ge$_{1-x}$Mn$_{x}$Te is investigated by x-ray diffraction and magnetization as a function of the Mn concentration $x$. The…

强关联电子 · 物理学 2017-06-20 M. Kriener , T. Nakajima , Y. Kaneko , A. Kikkawa , D. Hashizume , K. Kato , M. Takata , T. Arima , Y. Tokura , Y. Taguchi

The low temperature state of CeRu2Al10 has been studied by neutron powder diffraction and muon spin relaxation (muSR). By combining both techniques, we prove that the transition occurring below T*~27K, which has been the subject of…

High-quality single crystals of NdFeAsO$_{0.65}$F$_{0.35}$ (the transition temperature $T_{\rm c} \simeq 30.6$~K) were studied in zero-field (ZF) and transverse-field (TF) muon-spin rotation/relaxation ($\mu$SR) experiments. An upturn in…

We have measured magnetization M(T,H), electrical resistivity ro(T,H), thermal conductivity k(T,H), and thermopower S(T,H) of polycrystalline samples of Nd1-xEuxNiO3; 0 <= x <= 0.35; as a function of temperature and external magnetic field.…

强关联电子 · 物理学 2007-05-23 V. B. Barbeta , R. F. Jardim , M. T. Escote , N. R. Dilley

We explore the magnetotransport and thermoelectric (Seebeck and Nernst coefficients) properties of Mn3SnC an antiperovskite magnetic Nodal line semimetal. Mn3SnC shows paramagnetic (PM) to concurrent antiferromagnetic (AFM)/ferromagnetic…

强关联电子 · 物理学 2024-06-21 Sunil Gangwar , Sonika , C. S. Yadav

The appearance of static magnetism, nanoscopically coexisting with superconductivity, is shown to be a general feature of optimally electron-doped LnFe(1-x)Ru(x)AsO(1-y)F(y) superconductor (Ln - lanthanide ion) upon isovalent substitution…

超导电性 · 物理学 2013-04-29 S. Sanna , P. Carretta , R. De Renzi , G. Prando , P. Bonfà , M. Mazzani , G. Lamura , T. Shiroka , Y. Kobayashi , M. Sato

The magnetization as a function of magnetic field showed hysteretic behavior at room temperature. According to the temperature dependence of the magnetization, the Curie temperature $(T_{C})$ is higher than 350 K. Ferromagnetic Mn-doped tin…

材料科学 · 物理学 2017-09-19 Sushant Gupta , V. Ganesan , N. P. Lalla , Indra Sulania , B. Das

The Sm$_{0.95}$La$_{0.05}$FeAsO$_{0.85}$F$_{0.15}$ compound is a quasi-2D layered superconductor with a superconducting transition temperature T$_c$ = 52 K. Due to the Fe spin-orbital related anisotropic exchange coupling (antiferromagnetic…

超导电性 · 物理学 2009-11-13 B. C. Chang , C. H. Hsu , Y. Y. Hsu , Z. Wei , K. Q. Ruan , X. G. Li , H. C. Ku

The nature of the magnetic transition of the half-filled triangular antiferromagnet Ag$_{2}$NiO$_2$ with $T_{\rm N}$=56K was studied with positive muon-spin-rotation and relaxation ($\mu^+$SR) spectroscopy. Zero field $\mu^+$SR measurements…

强关联电子 · 物理学 2007-05-23 J. Sugiyama , Y. Ikedo , K. Mukai , J. H. Brewer , E. J. Ansaldo , G. D. Morris , K. H. Chow , H. Yoshida , Z. Hiroi

Sophisticated spin instruments require high-precision spin control. In this study, we accurately study the intrinsic magnetic properties of the strongly disordered system NdFe0.5Cr0.5O3 through molecular field models combined with ASD…

应用物理 · 物理学 2022-07-08 Jiyu Shen , Jiajun Mo , Zeyi Lu , Chenying Gong , Kaiyang Gao , Ke Shi , Lizhou Yu , Yan Chen , Min Liu , Yanfang Xia

(La1-xSrx)(Zn1-yMny)AsO is a two dimensional diluted ferromagnetic semiconductor that has the advantage of decoupled charge and spin doping. The substitution of Sr2+ for La3+ and Mn2+ for Zn2+ into the parent semiconductor LaZnAsO…

材料科学 · 物理学 2015-06-22 Cui Ding , Xin Gong , Huiyuan Man , Guoxiang Zhi , Shengli Guo , Yang Zhao , Hangdong Wang , Bin Chen , F. L. Ning